HTTP ARCHIVEALL REPORTSSTATE OF THE WEBSTATE OF JAVASCRIPTSTATE OF

IMAGESLOADING SPEED

Web Almanac 2020 State of the Web Report . The Web Almanac combines the raw stats and trends of the HTTP Archive with the expertise of the web community. The 2020 edition is a comprehensive report on the state of the web, backed by real data and trusted web experts, and comprised of 20+ chapters spanning aspects of page content, user experience, publishing, and distribution.

ABOUT HTTP ARCHIVE

The HTTP Archive provides this record. It is a permanent repository of web performance information such as size of pages, failed requests, and technologies utilized. This performance information allows us to see trends in how the Web is built and provides a common data set from which to conduct web performance research. REPORTS - HTTP ARCHIVE The Capabilities Project (aka. Project Fugu 🐡) is a cross-company effort at Google to make it possible for web apps to do anything native apps can, by exposing the capabilities of the operating system platform to the web platform, while maintaining user security, privacy, trust, and other core tenets of the web. View the Capabilities Report. HTTP ARCHIVE: STATE OF THE WEB Report: State of the Web. State of the Web. This report captures a long view of the web, including the adoption of techniques for efficient network utilization and usage of HTTP ARCHIVE: STATE OF IMAGES The sum of transfer size kilobytes of all external images requested by the page. An external image is identified as a resource with the png, gif, jpg, jpeg, webp, ico, or svg file extensions or a MIME type containing image. See also: Page Weight. Median Desktop. Median

Mobile.

THE 2020 WEB ALMANAC Our mission is to combine the raw stats and trends of the HTTP Archive with the expertise of the web community. The Web Almanac is a comprehensive report on the state of the web, backed by real data and trusted web experts. The 2020 edition is comprised of 22 chapters spanning aspects of page content, user experience, publishing, and

distribution.

THIRD PARTIES

In 2019 93.6% of mobile pages had third-party content, in 2020 this was 94.1%. In 2019 93.6% of desktop pages had third-party content, in 2020 this was 93.9%. Figure 6.1. Pages with third-party content. These prevalence numbers show a slight increase on the 2019 results: 93.87% of pages in the desktop crawl had at least one third-party request SEO | 2020 | THE WEB ALMANAC BY HTTP ARCHIVE Figure 7.2. robots.txt response codes. In addition to similar status code behavior, Disallow statement use was consistent between mobile and desktop versions of robots.txt files. The most prevalent User-agent declaration statement was the wildcard, User-agent: *, appearing on 74.40% of mobile and 73.16% of desktop robots.txt requests. The second most prevalent declaration was adsbot-google WEB ALMANAC 2020TRANSLATE THIS PAGE Le Web Almanac est un rapport complet sur l’état du Web, soutenu par des données réelles et des experts du Web. L’édition 2020 se compose de 22 chapitres couvrant l’expérience utilisateur, le contenu des pages, leur publication et leur distribution. Commencer l’exploration. 2020.

PAGE WEIGHT

The 10, 25, 50, 75, and 90th percentiles for mobile pages are: 369, 900, 1,915, 3,710, and 6,772 KB per page. Figure 18.1. Distribution of total bytes per page. We can however surmise from this the following: we are closing in on 7 MB of page weight on mobile and 7.5 MB on desktop at the 90th percentile. HTTP ARCHIVEALL REPORTSSTATE OF THE WEBSTATE OF JAVASCRIPTSTATE OF

IMAGESLOADING SPEED

Web Almanac 2020 State of the Web Report . The Web Almanac combines the raw stats and trends of the HTTP Archive with the expertise of the web community. The 2020 edition is a comprehensive report on the state of the web, backed by real data and trusted web experts, and comprised of 20+ chapters spanning aspects of page content, user experience, publishing, and distribution.

ABOUT HTTP ARCHIVE

The HTTP Archive provides this record. It is a permanent repository of web performance information such as size of pages, failed requests, and technologies utilized. This performance information allows us to see trends in how the Web is built and provides a common data set from which to conduct web performance research. REPORTS - HTTP ARCHIVE The Capabilities Project (aka. Project Fugu 🐡) is a cross-company effort at Google to make it possible for web apps to do anything native apps can, by exposing the capabilities of the operating system platform to the web platform, while maintaining user security, privacy, trust, and other core tenets of the web. View the Capabilities Report. HTTP ARCHIVE: STATE OF THE WEB Report: State of the Web. State of the Web. This report captures a long view of the web, including the adoption of techniques for efficient network utilization and usage of HTTP ARCHIVE: STATE OF IMAGES The sum of transfer size kilobytes of all external images requested by the page. An external image is identified as a resource with the png, gif, jpg, jpeg, webp, ico, or svg file extensions or a MIME type containing image. See also: Page Weight. Median Desktop. Median

Mobile.

THE 2020 WEB ALMANAC Our mission is to combine the raw stats and trends of the HTTP Archive with the expertise of the web community. The Web Almanac is a comprehensive report on the state of the web, backed by real data and trusted web experts. The 2020 edition is comprised of 22 chapters spanning aspects of page content, user experience, publishing, and

distribution.

THIRD PARTIES

In 2019 93.6% of mobile pages had third-party content, in 2020 this was 94.1%. In 2019 93.6% of desktop pages had third-party content, in 2020 this was 93.9%. Figure 6.1. Pages with third-party content. These prevalence numbers show a slight increase on the 2019 results: 93.87% of pages in the desktop crawl had at least one third-party request SEO | 2020 | THE WEB ALMANAC BY HTTP ARCHIVE Figure 7.2. robots.txt response codes. In addition to similar status code behavior, Disallow statement use was consistent between mobile and desktop versions of robots.txt files. The most prevalent User-agent declaration statement was the wildcard, User-agent: *, appearing on 74.40% of mobile and 73.16% of desktop robots.txt requests. The second most prevalent declaration was adsbot-google WEB ALMANAC 2020TRANSLATE THIS PAGE Le Web Almanac est un rapport complet sur l’état du Web, soutenu par des données réelles et des experts du Web. L’édition 2020 se compose de 22 chapitres couvrant l’expérience utilisateur, le contenu des pages, leur publication et leur distribution. Commencer l’exploration. 2020.

PAGE WEIGHT

The 10, 25, 50, 75, and 90th percentiles for mobile pages are: 369, 900, 1,915, 3,710, and 6,772 KB per page. Figure 18.1. Distribution of total bytes per page. We can however surmise from this the following: we are closing in on 7 MB of page weight on mobile and 7.5 MB on desktop at the 90th percentile.

ABOUT HTTP ARCHIVE

The HTTP Archive provides this record. It is a permanent repository of web performance information such as size of pages, failed requests, and technologies utilized. This performance information allows us to see trends in how the Web is built and provides a common data set from which to conduct web performance research. REPORTS - HTTP ARCHIVE The Capabilities Project (aka. Project Fugu 🐡) is a cross-company effort at Google to make it possible for web apps to do anything native apps can, by exposing the capabilities of the operating system platform to the web platform, while maintaining user security, privacy, trust, and other core tenets of the web. View the Capabilities Report. ABOUT THE HTTP ARCHIVE The HTTP Archive provides this record. It is a permanent repository of web performance information such as size of pages, failed requests, and technologies utilized. This performance information allows us to see trends in how the Web is built and provides a common data set from which to conduct web performance research. FREQUENTLY ASKED QUESTIONS FAQ The HTTP Archive tracks how the web is built. It provides historical data to quantitatively illustrate how the web is evolving. People who use the HTTP Archive data are members of the web community, scholars, and industry leaders: The web community uses this data to learn more about the state of the web. You may see it come up in blog posts HTTP ARCHIVE: LOADING SPEED The number of seconds from the time the navigation started until the document and all of its dependent resources have finished loading. See the load event on MDN for more info. Median Desktop 6.5 seconds 14.5%. Median Mobile 17.9 seconds 24.3%. Zoom 1m 3m 6m YTD 1y 3y All. HTTP ARCHIVE: STATE OF JAVASCRIPT Report: State of JavaScript. State of JavaScript. JavaScript powers the modern web, enabling rich and interactive web applications. In this report we dive into how JavaScript is used on the web, and its adoption and trends both for mobile and desktop experiences. JAVASCRIPT | 2020 | THE WEB ALMANAC BY HTTP ARCHIVE Bar chart showing the distribution of JavaScript requests per page in 2019. The 10, 25, 50, 75, and 90th percentiles for mobile pages are: 4, 9, 18, 32, and 52. Similar to the 2020 results, desktop pages only tend to have 0 or 1 more request per page. These results are slightly lower than the 2020 results. Figure 2.7. CSS | 2020 | THE WEB ALMANAC BY HTTP ARCHIVE It is one of the three main languages for building websites—the other two being HTML, used for structure, and JavaScript, used to specify behavior. In last year’s inaugural Web Almanac, we looked at a variety of CSS metrics measured through 41 SQL queries over the HTTP Archive corpus, to assess the state of the technology in 2019. CACHING | 2020 | THE WEB ALMANAC BY HTTP ARCHIVE Caching is a technique that enables the reuse of previously downloaded content. It involves something (a server which builds web pages, a proxy such as a CDN or the browser itself) storing ‘content’ (web pages, CSS, JS, images, fonts, etc.) and tagging it appropriately, so

it can

TABLE OF CONTENTS

Table of Contents Foreword. 2020 has been a year many of us would like to forget. It’s rare for a community as globalized as ours to be affected by events as far-reaching as the COVID-19 pandemic and protests against racial injustice. HTTP ARCHIVEALL REPORTSSTATE OF THE WEBSTATE OF JAVASCRIPTSTATE OF

IMAGESLOADING SPEED

Web Almanac 2020 State of the Web Report . The Web Almanac combines the raw stats and trends of the HTTP Archive with the expertise of the web community. The 2020 edition is a comprehensive report on the state of the web, backed by real data and trusted web experts, and comprised of 20+ chapters spanning aspects of page content, user experience, publishing, and distribution.

ABOUT HTTP ARCHIVE

The HTTP Archive provides this record. It is a permanent repository of web performance information such as size of pages, failed requests, and technologies utilized. This performance information allows us to see trends in how the Web is built and provides a common data set from which to conduct web performance research. REPORTS - HTTP ARCHIVE The Capabilities Project (aka. Project Fugu 🐡) is a cross-company effort at Google to make it possible for web apps to do anything native apps can, by exposing the capabilities of the operating system platform to the web platform, while maintaining user security, privacy, trust, and other core tenets of the web. View the Capabilities Report. HTTP ARCHIVE: STATE OF THE WEB Report: State of the Web. State of the Web. This report captures a long view of the web, including the adoption of techniques for efficient network utilization and usage of HTTP ARCHIVE: STATE OF IMAGES The sum of transfer size kilobytes of all external images requested by the page. An external image is identified as a resource with the png, gif, jpg, jpeg, webp, ico, or svg file extensions or a MIME type containing image. See also: Page Weight. Median Desktop. Median

Mobile.

FREQUENTLY ASKED QUESTIONS FAQ The HTTP Archive tracks how the web is built. It provides historical data to quantitatively illustrate how the web is evolving. People who use the HTTP Archive data are members of the web community, scholars, and industry leaders: The web community uses this data to learn more about the state of the web. You may see it come up in blog posts THE 2020 WEB ALMANAC Our mission is to combine the raw stats and trends of the HTTP Archive with the expertise of the web community. The Web Almanac is a comprehensive report on the state of the web, backed by real data and trusted web experts. The 2020 edition is comprised of 22 chapters spanning aspects of page content, user experience, publishing, and

distribution.

HTTP ARCHIVE: PAGE WEIGHT The sum of transfer size kilobytes of all videos requested by the page. A video is identified as a resource with the mp4, swf, f4v, or flv file extensions or a MIME type containing flash. Median Desktop 1761.1 KB 39.6%. Median Mobile 1971.4 KB 38.3%. Zoom 1m 3m 6m YTD 1y

3y All.

THIRD PARTIES

In 2019 93.6% of mobile pages had third-party content, in 2020 this was 94.1%. In 2019 93.6% of desktop pages had third-party content, in 2020 this was 93.9%. Figure 6.1. Pages with third-party content. These prevalence numbers show a slight increase on the 2019 results: 93.87% of pages in the desktop crawl had at least one third-party request

PAGE WEIGHT

The 10, 25, 50, 75, and 90th percentiles for mobile pages are: 369, 900, 1,915, 3,710, and 6,772 KB per page. Figure 18.1. Distribution of total bytes per page. We can however surmise from this the following: we are closing in on 7 MB of page weight HTTP ARCHIVEALL REPORTSSTATE OF THE WEBSTATE OF JAVASCRIPTSTATE OF

IMAGESLOADING SPEED

Web Almanac 2020 State of the Web Report . The Web Almanac combines the raw stats and trends of the HTTP Archive with the expertise of the web community. The 2020 edition is a comprehensive report on the state of the web, backed by real data and trusted web experts, and comprised of 20+ chapters spanning aspects of page content, user experience, publishing, and distribution.

ABOUT HTTP ARCHIVE

The HTTP Archive provides this record. It is a permanent repository of web performance information such as size of pages, failed requests, and technologies utilized. This performance information allows us to see trends in how the Web is built and provides a common data set from which to conduct web performance research. REPORTS - HTTP ARCHIVE The Capabilities Project (aka. Project Fugu 🐡) is a cross-company effort at Google to make it possible for web apps to do anything native apps can, by exposing the capabilities of the operating system platform to the web platform, while maintaining user security, privacy, trust, and other core tenets of the web. View the Capabilities Report. HTTP ARCHIVE: STATE OF THE WEB Report: State of the Web. State of the Web. This report captures a long view of the web, including the adoption of techniques for efficient network utilization and usage of HTTP ARCHIVE: STATE OF IMAGES The sum of transfer size kilobytes of all external images requested by the page. An external image is identified as a resource with the png, gif, jpg, jpeg, webp, ico, or svg file extensions or a MIME type containing image. See also: Page Weight. Median Desktop. Median

Mobile.

FREQUENTLY ASKED QUESTIONS FAQ The HTTP Archive tracks how the web is built. It provides historical data to quantitatively illustrate how the web is evolving. People who use the HTTP Archive data are members of the web community, scholars, and industry leaders: The web community uses this data to learn more about the state of the web. You may see it come up in blog posts THE 2020 WEB ALMANAC Our mission is to combine the raw stats and trends of the HTTP Archive with the expertise of the web community. The Web Almanac is a comprehensive report on the state of the web, backed by real data and trusted web experts. The 2020 edition is comprised of 22 chapters spanning aspects of page content, user experience, publishing, and

distribution.

HTTP ARCHIVE: PAGE WEIGHT The sum of transfer size kilobytes of all videos requested by the page. A video is identified as a resource with the mp4, swf, f4v, or flv file extensions or a MIME type containing flash. Median Desktop 1761.1 KB 39.6%. Median Mobile 1971.4 KB 38.3%. Zoom 1m 3m 6m YTD 1y

3y All.

THIRD PARTIES

In 2019 93.6% of mobile pages had third-party content, in 2020 this was 94.1%. In 2019 93.6% of desktop pages had third-party content, in 2020 this was 93.9%. Figure 6.1. Pages with third-party content. These prevalence numbers show a slight increase on the 2019 results: 93.87% of pages in the desktop crawl had at least one third-party request

PAGE WEIGHT

The 10, 25, 50, 75, and 90th percentiles for mobile pages are: 369, 900, 1,915, 3,710, and 6,772 KB per page. Figure 18.1. Distribution of total bytes per page. We can however surmise from this the following: we are closing in on 7 MB of page weight

HTTP ARCHIVE

Web Almanac 2020 State of the Web Report . The Web Almanac combines the raw stats and trends of the HTTP Archive with the expertise of the web community. The 2020 edition is a comprehensive report on the state of the web, backed by real data and trusted web experts, and comprised of 20+ chapters spanning aspects of page content, user experience, publishing, and distribution.

HTTP ARCHIVE MOBILE

HTTP Archive. tracks how the Web is built. Trends in web technology. load times, download sizes, performance scores. Interesting stats. popular scripts, image formats, errors, redirects. Website performance. specific URL screenshots, waterfall charts, HTTP headers. The HTTP Archive code is open source and the data is downloadable . HTTP ARCHIVE: LOADING SPEED The number of seconds from the time the navigation started until the document and all of its dependent resources have finished loading. See the load event on MDN for more info. Median Desktop 6.5 seconds 14.5%. Median Mobile 17.9 seconds 24.3%. Zoom 1m 3m 6m YTD 1y 3y All. HTTP ARCHIVE: PROGRESSIVE WEB APPS This report examines the state of Progressive Web Apps (PWAs). PWAs are a new class of web applications, enabled by the Service Worker APIs. Service workers allow apps to support network-independent loading, to receive push notifications as well as to synchronize data in the background, and — together with Web App Manifests — allow users to install PWAs.

THIRD PARTIES

In 2019 93.6% of mobile pages had third-party content, in 2020 this was 94.1%. In 2019 93.6% of desktop pages had third-party content, in 2020 this was 93.9%. Figure 6.1. Pages with third-party content. These prevalence numbers show a slight increase on the 2019 results: 93.87% of pages in the desktop crawl had at least one third-party request

HTTP ARCHIVE

All Top 100 Top 1000. Start: Nov 15 2010 Nov 29 2010 Dec 16 2010 Dec 28 2010 Jan 20 2011 Jan 31 2011 Feb 11 2011 Feb 26 2011 Mar 15 2011 Mar 29 2011 Apr 15 2011 Apr 30 2011 May 16 2011 Jun 1 2011 Jun 15 2011 Jul 1 2011 Jul 15 2011 Aug 1 2011 Aug 15 2011 Sep 1 2011 Sep 15 2011 Oct 1 2011 Oct 15 2011 Nov 1 2011 Nov 15 2011 Dec 1 2011 Dec 15 2011 CSS | 2020 | THE WEB ALMANAC BY HTTP ARCHIVE It is one of the three main languages for building websites—the other two being HTML, used for structure, and JavaScript, used to specify behavior. In last year’s inaugural Web Almanac, we looked at a variety of CSS metrics measured through 41 SQL queries over the HTTP Archive corpus, to assess the state of the technology in 2019. SEO | 2020 | THE WEB ALMANAC BY HTTP ARCHIVE Figure 7.2. robots.txt response codes. In addition to similar status code behavior, Disallow statement use was consistent between mobile and desktop versions of robots.txt files. The most prevalent User-agent declaration statement was the wildcard, User-agent: *, appearing on 74.40% of mobile and 73.16% of desktop robots.txt requests. The second most prevalent declaration was adsbot-google CDN | 2019 | THE WEB ALMANAC BY HTTP ARCHIVE Introduction “Use a Content Delivery Network” was one of Steve Souders original recommendations for making web sites load faster. It’s advice that remains valid today, and in this chapter of the Web Almanac we’re going to explore how widely Steve’s recommendation has been adopted, how sites are using Content Delivery Networks (CDNs), and some of the features they’re using. JAVASCRIPT | 2019 | THE WEB ALMANAC BY HTTP ARCHIVE JavaScript is a scripting language that makes it possible to build interactive and complex experiences on the web. This includes responding to user interactions, updating dynamic content on a page, and so forth. Anything involving how a web page should behave when an event occurs is what JavaScript is used for. HTTP ARCHIVEALL REPORTSSTATE OF THE WEBSTATE OF JAVASCRIPTSTATE OF

IMAGESLOADING SPEED

Web Almanac 2020 State of the Web Report . The Web Almanac combines the raw stats and trends of the HTTP Archive with the expertise of the web community. The 2020 edition is a comprehensive report on the state of the web, backed by real data and trusted web experts, and comprised of 20+ chapters spanning aspects of page content, user experience, publishing, and distribution.

ABOUT HTTP ARCHIVE

The HTTP Archive provides this record. It is a permanent repository of web performance information such as size of pages, failed requests, and technologies utilized. This performance information allows us to see trends in how the Web is built and provides a common data set from which to conduct web performance research. REPORTS - HTTP ARCHIVE The Capabilities Project (aka. Project Fugu 🐡) is a cross-company effort at Google to make it possible for web apps to do anything native apps can, by exposing the capabilities of the operating system platform to the web platform, while maintaining user security, privacy, trust, and other core tenets of the web. View the Capabilities Report. HTTP ARCHIVE: STATE OF THE WEB Report: State of the Web. State of the Web. This report captures a long view of the web, including the adoption of techniques for efficient network utilization and usage of HTTP ARCHIVE: STATE OF IMAGES The sum of transfer size kilobytes of all external images requested by the page. An external image is identified as a resource with the png, gif, jpg, jpeg, webp, ico, or svg file extensions or a MIME type containing image. See also: Page Weight. Median Desktop. Median

Mobile.

FREQUENTLY ASKED QUESTIONS FAQ The HTTP Archive tracks how the web is built. It provides historical data to quantitatively illustrate how the web is evolving. People who use the HTTP Archive data are members of the web community, scholars, and industry leaders: The web community uses this data to learn more about the state of the web. You may see it come up in blog posts THE 2020 WEB ALMANAC Our mission is to combine the raw stats and trends of the HTTP Archive with the expertise of the web community. The Web Almanac is a comprehensive report on the state of the web, backed by real data and trusted web experts. The 2020 edition is comprised of 22 chapters spanning aspects of page content, user experience, publishing, and

distribution.

HTTP ARCHIVE: PAGE WEIGHT The sum of transfer size kilobytes of all videos requested by the page. A video is identified as a resource with the mp4, swf, f4v, or flv file extensions or a MIME type containing flash. Median Desktop 1761.1 KB 39.6%. Median Mobile 1971.4 KB 38.3%. Zoom 1m 3m 6m YTD 1y

3y All.

THIRD PARTIES

In 2019 93.6% of mobile pages had third-party content, in 2020 this was 94.1%. In 2019 93.6% of desktop pages had third-party content, in 2020 this was 93.9%. Figure 6.1. Pages with third-party content. These prevalence numbers show a slight increase on the 2019 results: 93.87% of pages in the desktop crawl had at least one third-party request

PAGE WEIGHT

The 10, 25, 50, 75, and 90th percentiles for mobile pages are: 369, 900, 1,915, 3,710, and 6,772 KB per page. Figure 18.1. Distribution of total bytes per page. We can however surmise from this the following: we are closing in on 7 MB of page weight HTTP ARCHIVEALL REPORTSSTATE OF THE WEBSTATE OF JAVASCRIPTSTATE OF

IMAGESLOADING SPEED

Web Almanac 2020 State of the Web Report . The Web Almanac combines the raw stats and trends of the HTTP Archive with the expertise of the web community. The 2020 edition is a comprehensive report on the state of the web, backed by real data and trusted web experts, and comprised of 20+ chapters spanning aspects of page content, user experience, publishing, and distribution.

ABOUT HTTP ARCHIVE

The HTTP Archive provides this record. It is a permanent repository of web performance information such as size of pages, failed requests, and technologies utilized. This performance information allows us to see trends in how the Web is built and provides a common data set from which to conduct web performance research. REPORTS - HTTP ARCHIVE The Capabilities Project (aka. Project Fugu 🐡) is a cross-company effort at Google to make it possible for web apps to do anything native apps can, by exposing the capabilities of the operating system platform to the web platform, while maintaining user security, privacy, trust, and other core tenets of the web. View the Capabilities Report. HTTP ARCHIVE: STATE OF THE WEB Report: State of the Web. State of the Web. This report captures a long view of the web, including the adoption of techniques for efficient network utilization and usage of HTTP ARCHIVE: STATE OF IMAGES The sum of transfer size kilobytes of all external images requested by the page. An external image is identified as a resource with the png, gif, jpg, jpeg, webp, ico, or svg file extensions or a MIME type containing image. See also: Page Weight. Median Desktop. Median

Mobile.

FREQUENTLY ASKED QUESTIONS FAQ The HTTP Archive tracks how the web is built. It provides historical data to quantitatively illustrate how the web is evolving. People who use the HTTP Archive data are members of the web community, scholars, and industry leaders: The web community uses this data to learn more about the state of the web. You may see it come up in blog posts THE 2020 WEB ALMANAC Our mission is to combine the raw stats and trends of the HTTP Archive with the expertise of the web community. The Web Almanac is a comprehensive report on the state of the web, backed by real data and trusted web experts. The 2020 edition is comprised of 22 chapters spanning aspects of page content, user experience, publishing, and

distribution.

HTTP ARCHIVE: PAGE WEIGHT The sum of transfer size kilobytes of all videos requested by the page. A video is identified as a resource with the mp4, swf, f4v, or flv file extensions or a MIME type containing flash. Median Desktop 1761.1 KB 39.6%. Median Mobile 1971.4 KB 38.3%. Zoom 1m 3m 6m YTD 1y

3y All.

THIRD PARTIES

In 2019 93.6% of mobile pages had third-party content, in 2020 this was 94.1%. In 2019 93.6% of desktop pages had third-party content, in 2020 this was 93.9%. Figure 6.1. Pages with third-party content. These prevalence numbers show a slight increase on the 2019 results: 93.87% of pages in the desktop crawl had at least one third-party request

PAGE WEIGHT

The 10, 25, 50, 75, and 90th percentiles for mobile pages are: 369, 900, 1,915, 3,710, and 6,772 KB per page. Figure 18.1. Distribution of total bytes per page. We can however surmise from this the following: we are closing in on 7 MB of page weight

HTTP ARCHIVE MOBILE

HTTP Archive. tracks how the Web is built. Trends in web technology. load times, download sizes, performance scores. Interesting stats. popular scripts, image formats, errors, redirects. Website performance. specific URL screenshots, waterfall charts, HTTP headers. The HTTP Archive code is open source and the data is downloadable .

HTTP ARCHIVE

All Top 100 Top 1000. Start: Nov 15 2010 Nov 29 2010 Dec 16 2010 Dec 28 2010 Jan 20 2011 Jan 31 2011 Feb 11 2011 Feb 26 2011 Mar 15 2011 Mar 29 2011 Apr 15 2011 Apr 30 2011 May 16 2011 Jun 1 2011 Jun 15 2011 Jul 1 2011 Jul 15 2011 Aug 1 2011 Aug 15 2011 Sep 1 2011 Sep 15 2011 Oct 1 2011 Oct 15 2011 Nov 1 2011 Nov 15 2011 Dec 1 2011 Dec 15 2011 HTTP ARCHIVE: LOADING SPEED The number of seconds from the time the navigation started until the document and all of its dependent resources have finished loading. See the load event on MDN for more info. Median Desktop 6.5 seconds 14.5%. Median Mobile 17.9 seconds 24.3%. Zoom 1m 3m 6m YTD 1y 3y All. CSS | 2020 | THE WEB ALMANAC BY HTTP ARCHIVE It is one of the three main languages for building websites—the other two being HTML, used for structure, and JavaScript, used to specify behavior. In last year’s inaugural Web Almanac, we looked at a variety of CSS metrics measured through 41 SQL queries over the HTTP Archive corpus, to assess the state of the technology in 2019. HTTP ARCHIVE: PROGRESSIVE WEB APPS This report examines the state of Progressive Web Apps (PWAs). PWAs are a new class of web applications, enabled by the Service Worker APIs. Service workers allow apps to support network-independent loading, to receive push notifications as well as to synchronize data in the background, and — together with Web App Manifests — allow users to install PWAs. HTTP ARCHIVE: PAGE WEIGHT The sum of transfer size kilobytes of all videos requested by the page. A video is identified as a resource with the mp4, swf, f4v, or flv file extensions or a MIME type containing flash. Median Desktop 1761.1 KB 39.6%. Median Mobile 1971.4 KB 38.3%. Zoom 1m 3m 6m YTD 1y

3y All.

THIRD PARTIES

In 2019 93.6% of mobile pages had third-party content, in 2020 this was 94.1%. In 2019 93.6% of desktop pages had third-party content, in 2020 this was 93.9%. Figure 6.1. Pages with third-party content. These prevalence numbers show a slight increase on the 2019 results: 93.87% of pages in the desktop crawl had at least one third-party request JAVASCRIPT | 2020 | THE WEB ALMANAC BY HTTP ARCHIVE Bar chart showing the distribution of JavaScript requests per page in 2019. The 10, 25, 50, 75, and 90th percentiles for mobile pages are: 4, 9, 18, 32, and 52. Similar to the 2020 results, desktop pages only tend to have 0 or 1 more request per page. These results are slightly lower than the 2020 results. Figure 2.7. SEO | 2020 | THE WEB ALMANAC BY HTTP ARCHIVE Figure 7.2. robots.txt response codes. In addition to similar status code behavior, Disallow statement use was consistent between mobile and desktop versions of robots.txt files. The most prevalent User-agent declaration statement was the wildcard, User-agent: *, appearing on 74.40% of mobile and 73.16% of desktop robots.txt requests. The second most prevalent declaration was adsbot-google JAVASCRIPT | 2019 | THE WEB ALMANAC BY HTTP ARCHIVE JavaScript is a scripting language that makes it possible to build interactive and complex experiences on the web. This includes responding to user interactions, updating dynamic content on a page, and so forth. Anything involving how a web page should behave when an event occurs is what JavaScript is used for. HTTP ARCHIVEALL REPORTSSTATE OF THE WEBSTATE OF JAVASCRIPTSTATE OF

IMAGESLOADING SPEED

Web Almanac 2020 State of the Web Report . The Web Almanac combines the raw stats and trends of the HTTP Archive with the expertise of the web community. The 2020 edition is a comprehensive report on the state of the web, backed by real data and trusted web experts, and comprised of 20+ chapters spanning aspects of page content, user experience, publishing, and distribution.

ABOUT HTTP ARCHIVE

The HTTP Archive provides this record. It is a permanent repository of web performance information such as size of pages, failed requests, and technologies utilized. This performance information allows us to see trends in how the Web is built and provides a common data set from which to conduct web performance research. REPORTS - HTTP ARCHIVE The Capabilities Project (aka. Project Fugu 🐡) is a cross-company effort at Google to make it possible for web apps to do anything native apps can, by exposing the capabilities of the operating system platform to the web platform, while maintaining user security, privacy, trust, and other core tenets of the web. View the Capabilities Report. HTTP ARCHIVE: STATE OF THE WEB Report: State of the Web. State of the Web. This report captures a long view of the web, including the adoption of techniques for efficient network utilization and usage of HTTP ARCHIVE: STATE OF IMAGES The sum of transfer size kilobytes of all external images requested by the page. An external image is identified as a resource with the png, gif, jpg, jpeg, webp, ico, or svg file extensions or a MIME type containing image. See also: Page Weight. Median Desktop. Median

Mobile.

FREQUENTLY ASKED QUESTIONS FAQ The HTTP Archive tracks how the web is built. It provides historical data to quantitatively illustrate how the web is evolving. People who use the HTTP Archive data are members of the web community, scholars, and industry leaders: The web community uses this data to learn more about the state of the web. You may see it come up in blog posts THE 2020 WEB ALMANAC Our mission is to combine the raw stats and trends of the HTTP Archive with the expertise of the web community. The Web Almanac is a comprehensive report on the state of the web, backed by real data and trusted web experts. The 2020 edition is comprised of 22 chapters spanning aspects of page content, user experience, publishing, and

distribution.

HTTP ARCHIVE: PAGE WEIGHT The sum of transfer size kilobytes of all videos requested by the page. A video is identified as a resource with the mp4, swf, f4v, or flv file extensions or a MIME type containing flash. Median Desktop 1761.1 KB 39.6%. Median Mobile 1971.4 KB 38.3%. Zoom 1m 3m 6m YTD 1y

3y All.

THIRD PARTIES

In 2019 93.6% of mobile pages had third-party content, in 2020 this was 94.1%. In 2019 93.6% of desktop pages had third-party content, in 2020 this was 93.9%. Figure 6.1. Pages with third-party content. These prevalence numbers show a slight increase on the 2019 results: 93.87% of pages in the desktop crawl had at least one third-party request

PAGE WEIGHT

The 10, 25, 50, 75, and 90th percentiles for mobile pages are: 369, 900, 1,915, 3,710, and 6,772 KB per page. Figure 18.1. Distribution of total bytes per page. We can however surmise from this the following: we are closing in on 7 MB of page weight HTTP ARCHIVEALL REPORTSSTATE OF THE WEBSTATE OF JAVASCRIPTSTATE OF

IMAGESLOADING SPEED

Web Almanac 2020 State of the Web Report . The Web Almanac combines the raw stats and trends of the HTTP Archive with the expertise of the web community. The 2020 edition is a comprehensive report on the state of the web, backed by real data and trusted web experts, and comprised of 20+ chapters spanning aspects of page content, user experience, publishing, and distribution.

ABOUT HTTP ARCHIVE

The HTTP Archive provides this record. It is a permanent repository of web performance information such as size of pages, failed requests, and technologies utilized. This performance information allows us to see trends in how the Web is built and provides a common data set from which to conduct web performance research. REPORTS - HTTP ARCHIVE The Capabilities Project (aka. Project Fugu 🐡) is a cross-company effort at Google to make it possible for web apps to do anything native apps can, by exposing the capabilities of the operating system platform to the web platform, while maintaining user security, privacy, trust, and other core tenets of the web. View the Capabilities Report. HTTP ARCHIVE: STATE OF THE WEB Report: State of the Web. State of the Web. This report captures a long view of the web, including the adoption of techniques for efficient network utilization and usage of HTTP ARCHIVE: STATE OF IMAGES The sum of transfer size kilobytes of all external images requested by the page. An external image is identified as a resource with the png, gif, jpg, jpeg, webp, ico, or svg file extensions or a MIME type containing image. See also: Page Weight. Median Desktop. Median

Mobile.

FREQUENTLY ASKED QUESTIONS FAQ The HTTP Archive tracks how the web is built. It provides historical data to quantitatively illustrate how the web is evolving. People who use the HTTP Archive data are members of the web community, scholars, and industry leaders: The web community uses this data to learn more about the state of the web. You may see it come up in blog posts THE 2020 WEB ALMANAC Our mission is to combine the raw stats and trends of the HTTP Archive with the expertise of the web community. The Web Almanac is a comprehensive report on the state of the web, backed by real data and trusted web experts. The 2020 edition is comprised of 22 chapters spanning aspects of page content, user experience, publishing, and

distribution.

HTTP ARCHIVE: PAGE WEIGHT The sum of transfer size kilobytes of all videos requested by the page. A video is identified as a resource with the mp4, swf, f4v, or flv file extensions or a MIME type containing flash. Median Desktop 1761.1 KB 39.6%. Median Mobile 1971.4 KB 38.3%. Zoom 1m 3m 6m YTD 1y

3y All.

THIRD PARTIES

In 2019 93.6% of mobile pages had third-party content, in 2020 this was 94.1%. In 2019 93.6% of desktop pages had third-party content, in 2020 this was 93.9%. Figure 6.1. Pages with third-party content. These prevalence numbers show a slight increase on the 2019 results: 93.87% of pages in the desktop crawl had at least one third-party request

PAGE WEIGHT

The 10, 25, 50, 75, and 90th percentiles for mobile pages are: 369, 900, 1,915, 3,710, and 6,772 KB per page. Figure 18.1. Distribution of total bytes per page. We can however surmise from this the following: we are closing in on 7 MB of page weight

HTTP ARCHIVE MOBILE

HTTP Archive. tracks how the Web is built. Trends in web technology. load times, download sizes, performance scores. Interesting stats. popular scripts, image formats, errors, redirects. Website performance. specific URL screenshots, waterfall charts, HTTP headers. The HTTP Archive code is open source and the data is downloadable .

HTTP ARCHIVE

All Top 100 Top 1000. Start: Nov 15 2010 Nov 29 2010 Dec 16 2010 Dec 28 2010 Jan 20 2011 Jan 31 2011 Feb 11 2011 Feb 26 2011 Mar 15 2011 Mar 29 2011 Apr 15 2011 Apr 30 2011 May 16 2011 Jun 1 2011 Jun 15 2011 Jul 1 2011 Jul 15 2011 Aug 1 2011 Aug 15 2011 Sep 1 2011 Sep 15 2011 Oct 1 2011 Oct 15 2011 Nov 1 2011 Nov 15 2011 Dec 1 2011 Dec 15 2011 HTTP ARCHIVE: LOADING SPEED The number of seconds from the time the navigation started until the document and all of its dependent resources have finished loading. See the load event on MDN for more info. Median Desktop 6.5 seconds 14.5%. Median Mobile 17.9 seconds 24.3%. Zoom 1m 3m 6m YTD 1y 3y All. CSS | 2020 | THE WEB ALMANAC BY HTTP ARCHIVE It is one of the three main languages for building websites—the other two being HTML, used for structure, and JavaScript, used to specify behavior. In last year’s inaugural Web Almanac, we looked at a variety of CSS metrics measured through 41 SQL queries over the HTTP Archive corpus, to assess the state of the technology in 2019. HTTP ARCHIVE: PROGRESSIVE WEB APPS This report examines the state of Progressive Web Apps (PWAs). PWAs are a new class of web applications, enabled by the Service Worker APIs. Service workers allow apps to support network-independent loading, to receive push notifications as well as to synchronize data in the background, and — together with Web App Manifests — allow users to install PWAs. HTTP ARCHIVE: PAGE WEIGHT The sum of transfer size kilobytes of all videos requested by the page. A video is identified as a resource with the mp4, swf, f4v, or flv file extensions or a MIME type containing flash. Median Desktop 1761.1 KB 39.6%. Median Mobile 1971.4 KB 38.3%. Zoom 1m 3m 6m YTD 1y

3y All.

THIRD PARTIES

In 2019 93.6% of mobile pages had third-party content, in 2020 this was 94.1%. In 2019 93.6% of desktop pages had third-party content, in 2020 this was 93.9%. Figure 6.1. Pages with third-party content. These prevalence numbers show a slight increase on the 2019 results: 93.87% of pages in the desktop crawl had at least one third-party request JAVASCRIPT | 2020 | THE WEB ALMANAC BY HTTP ARCHIVE Bar chart showing the distribution of JavaScript requests per page in 2019. The 10, 25, 50, 75, and 90th percentiles for mobile pages are: 4, 9, 18, 32, and 52. Similar to the 2020 results, desktop pages only tend to have 0 or 1 more request per page. These results are slightly lower than the 2020 results. Figure 2.7. SEO | 2020 | THE WEB ALMANAC BY HTTP ARCHIVE Figure 7.2. robots.txt response codes. In addition to similar status code behavior, Disallow statement use was consistent between mobile and desktop versions of robots.txt files. The most prevalent User-agent declaration statement was the wildcard, User-agent: *, appearing on 74.40% of mobile and 73.16% of desktop robots.txt requests. The second most prevalent declaration was adsbot-google JAVASCRIPT | 2019 | THE WEB ALMANAC BY HTTP ARCHIVE JavaScript is a scripting language that makes it possible to build interactive and complex experiences on the web. This includes responding to user interactions, updating dynamic content on a page, and so forth. Anything involving how a web page should behave when an event occurs is what JavaScript is used for. HTTP ARCHIVEALL REPORTSSTATE OF THE WEBSTATE OF JAVASCRIPTSTATE OF

IMAGESLOADING SPEED

Web Almanac 2020 State of the Web Report . The Web Almanac combines the raw stats and trends of the HTTP Archive with the expertise of the web community. The 2020 edition is a comprehensive report on the state of the web, backed by real data and trusted web experts, and comprised of 20+ chapters spanning aspects of page content, user experience, publishing, and distribution.

ABOUT HTTP ARCHIVE

The HTTP Archive Tracks how the web is built by periodically crawl the top sites on the web and record detailed information about fetched resources, used web platform APIs and features, and execution traces

of

REPORTS - HTTP ARCHIVEONLINE LIBRARY ARCHIVEBOOK ARCHIVECONSUMER REPORTS ARCHIVES ONLINEPAST WEATHER REPORTS ARCHIVE List of reports the HTTP Archive Tracks creates to track various aspects of the the web: State of the Web, State of JavaScript, State of Images, Loading Speed, Progressive Web Apps, Accessibility, SEO, Page Weight, Chrome User Experience Report, and Capabilities.

HTTP ARCHIVE MOBILE

Write your own custom queries! sponsors: Google, Mozilla, New Relic, O’Reilly Media, Etsy, dynaTrace, Instart Logic, Catchpoint Systems, Fastly, SOASTA mPulse HTTP ARCHIVE: STATE OF THE WEB Report: State of the Web This report captures a long view of the web, including the adoption of techniques for efficient network utilization and usage of web standards like HTTPS. HTTP ARCHIVE: STATE OF IMAGES Image Bytes. The sum of transfer size kilobytes of all external images requested by the page. An external image is identified as a resource with the png, gif, jpg, jpeg, webp, ico, or svg file extensions or a MIME type containing image.. See also: Page Weight DOWNLOADS - HTTP ARCHIVE HTTP Archive. DESKTOP MOBILE. Trends; Stats; Websites; Discuss; About. Mission; FAQ; Download Data HTTP ARCHIVE: PROGRESSIVE WEB APPS This report examines the state of Progressive Web Apps (PWAs). PWAs are a new class of web applications, enabled by the Service Worker APIs. Service workers allow apps to support network-independent loading, to receive push notifications as well as to synchronize data in the background, and — together with Web App Manifests — allow users to install PWAs.

THIRD PARTIES

Figure 6.1. Pages with third-party content These prevalence numbers show a slight increase on the 2019 results: 93.87% of pages in the desktop crawl had at least one third-party request, the number was slightly higher at 94.10% of pages in the mobile crawl.A brief look into the small number of pages with no third-party content revealed that many were adult sites, some were government domains THE 2020 WEB ALMANAC Unless otherwise noted, the metrics in all of the 22 chapters of the 2020 Web Almanac are sourced from the HTTP Archive dataset. HTTP Archive is a community-run project that has been tracking how the web is built since 2010. HTTP ARCHIVEALL REPORTSSTATE OF THE WEBSTATE OF JAVASCRIPTSTATE OF

IMAGESLOADING SPEED

Web Almanac 2020 State of the Web Report . The Web Almanac combines the raw stats and trends of the HTTP Archive with the expertise of the web community. The 2020 edition is a comprehensive report on the state of the web, backed by real data and trusted web experts, and comprised of 20+ chapters spanning aspects of page content, user experience, publishing, and distribution.

ABOUT HTTP ARCHIVE

The HTTP Archive Tracks how the web is built by periodically crawl the top sites on the web and record detailed information about fetched resources, used web platform APIs and features, and execution traces

of

REPORTS - HTTP ARCHIVEONLINE LIBRARY ARCHIVEBOOK ARCHIVECONSUMER REPORTS ARCHIVES ONLINEPAST WEATHER REPORTS ARCHIVE List of reports the HTTP Archive Tracks creates to track various aspects of the the web: State of the Web, State of JavaScript, State of Images, Loading Speed, Progressive Web Apps, Accessibility, SEO, Page Weight, Chrome User Experience Report, and Capabilities.

HTTP ARCHIVE MOBILE

Write your own custom queries! sponsors: Google, Mozilla, New Relic, O’Reilly Media, Etsy, dynaTrace, Instart Logic, Catchpoint Systems, Fastly, SOASTA mPulse HTTP ARCHIVE: STATE OF THE WEB Report: State of the Web This report captures a long view of the web, including the adoption of techniques for efficient network utilization and usage of web standards like HTTPS. HTTP ARCHIVE: STATE OF IMAGES Image Bytes. The sum of transfer size kilobytes of all external images requested by the page. An external image is identified as a resource with the png, gif, jpg, jpeg, webp, ico, or svg file extensions or a MIME type containing image.. See also: Page Weight DOWNLOADS - HTTP ARCHIVE HTTP Archive. DESKTOP MOBILE. Trends; Stats; Websites; Discuss; About. Mission; FAQ; Download Data HTTP ARCHIVE: PROGRESSIVE WEB APPS This report examines the state of Progressive Web Apps (PWAs). PWAs are a new class of web applications, enabled by the Service Worker APIs. Service workers allow apps to support network-independent loading, to receive push notifications as well as to synchronize data in the background, and — together with Web App Manifests — allow users to install PWAs.

THIRD PARTIES

Figure 6.1. Pages with third-party content These prevalence numbers show a slight increase on the 2019 results: 93.87% of pages in the desktop crawl had at least one third-party request, the number was slightly higher at 94.10% of pages in the mobile crawl.A brief look into the small number of pages with no third-party content revealed that many were adult sites, some were government domains THE 2020 WEB ALMANAC Unless otherwise noted, the metrics in all of the 22 chapters of the 2020 Web Almanac are sourced from the HTTP Archive dataset. HTTP Archive is a community-run project that has been tracking how the web is built since 2010.

HTTP ARCHIVE

Web Almanac 2020 State of the Web Report . The Web Almanac combines the raw stats and trends of the HTTP Archive with the expertise of the web community. The 2020 edition is a comprehensive report on the state of the web, backed by real data and trusted web experts, and comprised of 20+ chapters spanning aspects of page content, user experience, publishing, and distribution. DOWNLOADS - HTTP ARCHIVE HTTP Archive. DESKTOP MOBILE. Trends; Stats; Websites; Discuss; About. Mission; FAQ; Download Data HTTP ARCHIVE: ACCESSIBILITY This report tracks accessibility of pages as measured by Lighthouse. Metrics in this report are only available for mobile. FREQUENTLY ASKED QUESTIONS FAQ Frequently Asked Questions FAQ . What does the HTTP Archive do? How does the HTTP Archive decide which URLs to test? How is the data gathered? How accurate HTTP ARCHIVE: PROGRESSIVE WEB APPS This report examines the state of Progressive Web Apps (PWAs). PWAs are a new class of web applications, enabled by the Service Worker APIs. Service workers allow apps to support network-independent loading, to receive push notifications as well as to synchronize data in the background, and — together with Web App Manifests — allow users to install PWAs.

HTTP ARCHIVE: SEO

hreflang. The percent of pages with a valid hreflang attribute, which allows crawlers to discover alternate translations of the page content. Validity is measured by Lighthouse. This metric is HTTP ARCHIVE: LOADING SPEED Web performance can directly impact business metrics like conversion and user happiness. This report analyzes various performance metrics in the lifecycle of a loading page including those used by many modern progressive web apps. JAVASCRIPT | 2020 | THE WEB ALMANAC BY HTTP ARCHIVE JavaScript chapter of the 2020 Web Almanac covering how much JavaScript we use on the web, compression, libraries and frameworks, loading, and source maps.

HTTP ARCHIVE

HTTP Archive

CDN | 2019 | THE WEB ALMANAC BY HTTP ARCHIVE Introduction “Use a Content Delivery Network” was one of Steve Souders original recommendations for making web sites load faster. It’s advice that remains valid today, and in this chapter of the Web Almanac we’re going to explore how widely Steve’s recommendation has been adopted, how sites are using Content Delivery Networks (CDNs), and some of the features they’re using.

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THE HTTP ARCHIVE TRACKS HOW THE WEB IS BUILT. We periodically crawl the top sites on the web and record detailed information about fetched resources, used web platform APIs and features, and execution traces of each page. We then crunch and analyze this data to identify trends — learn more about our

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WEB ALMANAC 2020 STATE OF THE WEB REPORT The Web Almanac combines the raw stats and trends of the HTTP Archive with the expertise of the web community. The 2020 edition is a comprehensive report on the state of the web, backed by real data and trusted web experts, and comprised of 20+ chapters spanning aspects of page content, user experience, publishing, and distribution. Read The 2020 Web Almanac PUBLIC DATASET GOOGLE BIGQUERY The HTTP Archive archives and provides access to detailed information about each website it crawls: request and response metadata, response bodies, execution traces, and more. You can download this data for offline analysis, or access it as a public dataset via Google BigQuery for fast and rapid analysis. Learn More about using BigQuery

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