Google PageSpeed Tools: Difference between revisions
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'''Google PageSpeed''' is a family of tools by [[Google|Google Inc]] |
'''Google PageSpeed''' is a family of tools by [[Google|Google, Inc.]]<ref>{{Cite web |title=About PageSpeed Insights |url=https://developers.google.com/speed/docs/insights/v5/about |access-date=2022-08-13 |website=Google Developers |language=en}}</ref> designed to help [[Web performance|optimize website performance]].<ref>{{cite web|last1=Ivanovs|first1=Alex|title=PageSpeed Module: Improving Your Websites' Performance|url=https://huffingtonpost.com/alex-ivanovs/pagespeed-module-improvin_b_5130698.html|website=huffingtonpost.com/|date=16 April 2014|publisher=The Huffington Post|access-date=23 March 2015}}</ref> It was introduced at a [[Google I/O|Developer Conference]] in 2010.<ref>{{cite web|last1=Kerner|first1=Sean Michael|title=Google Speeds Up the Web with Apache Web Server Module|url=http://www.serverwatch.com/news/article.php/3911511/Google-Speeds-Up-the-Web-with-Apache-Web-Server-Module.htm|website=serverwatch.com/news/|date=4 November 2010|access-date=23 March 2015}}</ref><ref>{{cite web|last1=Ram|first1=Ramani|title=Page Speed Service: Web performance, delivered|url=http://googlecode.blogspot.com/2011/07/page-speed-service-web-performance.html|website=googlecode.blogspot.com/|access-date=17 March 2015|date=2011-07-29}}</ref> |
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There are four main components of PageSpeed family tools: |
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* [[#PageSpeed Modules|PageSpeed Module]] (consisting of mod PageSpeed<ref>{{cite web |title=Github |url=https://github.com/apache/incubator-pagespeed-mod |access-date=6 August 2020 |website=github.com |publisher=Google Inc}}</ref> for the [[Apache HTTP Server]] and NGX PageSpeed<ref>{{cite web |title=Github |url=https://github.com/apache/incubator-pagespeed-ngx |access-date=6 August 2020 |website=github.com |publisher=Google Inc}}</ref> for the [[Nginx]])<ref>{{cite web |title=Apache Incubator |url=https://www.modpagespeed.com/ |access-date=6 August 2020 |website=modpagespeed.com/ |publisher=Google Inc}}</ref> |
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* [[#PageSpeed Insights|PageSpeed Insights]] |
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* [[#PageSpeed Service|PageSpeed Service]] |
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* [[#PageSpeed Chrome Extension|PageSpeed Chrome DevTools]] extension. These components aim to identify and automatically correct deviations from Google's Web Performance Best Practices. |
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==PageSpeed Modules== |
==PageSpeed Modules== |
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The PageSpeed Modules are the [[ |
The [[Google PageSpeed Tools#PageSpeed Modules|PageSpeed Modules]] are the [[open-source]] [[Apache HTTP Server]] or [[Nginx]] web server modules, which automatically apply chosen filters to pages, associated assets (like [[Cascading Style Sheets|stylesheets]], [[JavaScript]], and [[HTML]] files), as well as to images and [[Web cache|website cache]] requirements. These modules do not require modifications to existing content or workflow,<ref>{{cite web|last1=Edwards|first1=Ben|date=2014-07-28|title=Authoring critical above-the-fold CSS|url=https://benedfit.com/2014/07/authoring-critical-above-the-fold-css/|access-date=23 March 2015|website=benedfit.com}}</ref> meaning that all internal optimizations and changes to files are made on the server side, and present modified files directly to the user. Each of the 40+ filters corresponds to one of Google's web performance best practices rules. |
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Since PageSpeed module is an [[open |
Since the PageSpeed module is an [[open-source]] library, it is frequently updated by numerous developers worldwide. It can be deployed by any individual site, [[Internet hosting service|hosting providers]], or [[Content delivery network|CDNs]].<ref>{{cite web|title=PageSpeed Insights SDK|url=https://code.google.com/p/page-speed/|access-date=23 March 2015|website=code.google.com|publisher=Google Inc}}</ref> |
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The installation can be done in two ways: from packages or |
The installation can be done in two ways: from packages or built from source on the following supported platforms: |
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*[[Fedora Linux|Fedora]]/[[Rocky Linux|Rocky]], both 32-bit and 64-bit |
*[[Fedora Linux|Fedora]]/[[Rocky Linux|Rocky]], both 32-bit and 64-bit |
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*[[Debian]]/[[Ubuntu (operating system)|Ubuntu]], both 32-bit and 64-bit |
*[[Debian]]/[[Ubuntu (operating system)|Ubuntu]], both 32-bit and 64-bit |
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==Filters== |
==Filters== |
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PageSpeed module filters are settings, based on which a |
PageSpeed module filters are settings, based on which a web page optimization rule is applied. They can be divided into five main categories: |
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*[[#Stylesheets optimizations|Stylesheets optimizations]] |
*[[#Stylesheets optimizations|Stylesheets optimizations]] |
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*[[#Javascript files optimizations|Javascript files optimizations]] |
*[[#Javascript files optimizations|Javascript files optimizations]] |
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*[[#Images optimizations|Images optimizations]] |
*[[#Images optimizations|Images optimizations]] |
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*[[#HTML optimizations|HTML optimizations]] |
*[[#HTML optimizations|HTML optimizations]] |
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*[[#Tracking activity filters|Tracking activity filters]] |
*[[#Tracking activity filters|Tracking activity filters]] |
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==Speed impact== |
==Speed impact== |
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The PageSpeed Module showed the most significant impact on decreasing |
The PageSpeed Module showed the most significant impact on decreasing web page loading times, payload size, and number of requests compared to other industry options. According to several researchers, '[https://www.modpagespeed.com/ mod_pagespeed]' can reduce loading times by up to 80%, the number of bytes on a wire can be decreased by 30%, and the number of total requests can drop by over 20%. Since many search engines, including Google, employ a ranking algorithm that is affected by a page's loading speed, these optimizations can impact a website's placement in search results.<ref>{{cite web|last1=Enge|first1=Eric|title=Case Study: Impact of Code Cleanup on Site Traffic|url=http://searchenginewatch.com/sew/study/2064113/case-study-impact-code-cleanup-site-traffic|website=searchenginewatch.com/|publisher=Search Engine Watch|access-date=23 March 2015|date=2011-03-06}}</ref><ref>{{cite web|last1=Kuchler|first1=Margaret|title=The Growing Need For Speed: How Site Performance Increasingly Influences Search Rankings|url=http://www.retailtouchpoints.com/cross-channel-strategies/885-the-growing-need-for-speed-how-site-performance-increasingly-influences-search-rankings|website=retailtouchpoints.com/|date=19 May 2011|publisher=Retail Touch Points|access-date=23 March 2015}}</ref> As of February 2015, Google has begun testing “Slow” labels on mobile devices<ref>{{cite web|last1=Barry|first1=Shwartz|title=Google Testing A Red "Slow" Label In The Search Results For Slower Sites|url=http://searchengineland.com/google-testing-red-slow-label-search-results-slower-sites-215483|website=searchengineland.com/|access-date=17 March 2015|date=2015-02-25}}</ref> for websites that exceed a certain amount of loading time, prompting developers to examine ways to increase a page's load speed. |
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Google estimates that for every delay in mobile page load time, the conversion rate drops by 20%.<ref>{{Cite web |title=Mobile Page Load Delay Causes Conversion Loss |url=https://www.thinkwithgoogle.com/marketing-strategies/app-and-mobile/mobile-page-speed-conversion-data/ |access-date=2024-05-23 |website=Think with Google |language=en}}</ref> |
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PageSpeed Insights<ref>{{cite web|title=PageSpeed Insights|url=https://developers.google.com/speed/pagespeed/insights/|website=PageSpeed Insights|publisher=Google Inc.}}</ref> is an online synthetic benchmark tool which helps in identifying performance best practices on any single URL, provides suggestions on a webpage's optimizations, and suggests overall ideas of how to make a website faster.<ref>{{cite web|last1=Wagner|first1=Janet|title=GOOGLE RELEASES PAGESPEED INSIGHTS API V2|url=http://www.programmableweb.com/news/google-releases-pagespeed-insights-api-v2/brief/2015/01/15|website=programmableweb.com/|publisher=Programmable Web|access-date=23 March 2015|date=2015-01-15}}</ref> This tool can be accessed directly in any browser. Per URL request, it grades webpage performance on a scale from 1 to 100 and provides a report on suggested optimizations, divided into categories of high (score > 80, indicating most best practices have been implemented and there is little headroom for improvement), medium (between 60 and 79- indicating that the page is missing some common optimizations there is some headroom for optimization), and low priorities( Score below 60, indicating a non-optimized page)-[https://developers.google.com/speed/docs/insights/v4/about About PageSpeed Insights]<ref>{{cite web|last1=Burton|first1=Clark|title=A Technical Guide to Google's PageSpeed Insights Reports|url=https://iamattila.com/seo/google-pagespeed-insights.php|access-date=12 July 2018|date=2016-11-08}}</ref> |
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⚫ | |||
Currently, the Page Speed Insight score is calculated on the basis of five factors:<ref>{{Cite web |title=About PageSpeed Insights |url=https://developers.google.com/speed/docs/insights/v5/about |access-date=2023-08-29 |website=Google for Developers |language=en}}</ref><ref>{{Cite web |title=Lighthouse Scoring calculator |url=https://googlechrome.github.io/lighthouse/scorecalc/ |access-date=2023-08-29 |website=googlechrome.github.io}}</ref> |
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'''[https://pagespeed.web.dev/ PageSpeed Insights (PSI)]''' is a free tool from Google that analyzes the performance of a web page on both mobile and desktop devices. It provides suggestions on how to improve the page's speed and overall user experience. |
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'''Data and Metrics''' |
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# First Contentful Paint (FCP)- 10% |
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# Speed Index (SI)- 10% |
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# Largest Contentful Paint (LCP)- 25% |
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# Total Blocking Time (TBT)- 30% |
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# Cumulative Layout Shift (CLS)- 25% |
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PSI utilizes [https://web.dev/articles/speed-tools two main types of data]: |
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Recent versions of PageSpeed Insights added support<ref>{{cite web|title=Real-world user experience data|url=https://developers.google.com/speed/docs/insights/v5/about#crux|website=PageSpeed Insights|publisher=Google Inc.}}</ref> for measuring real-world user experience using the Chrome User Experience Report.<ref>{{cite web|url=https://developers.google.com/web/tools/chrome-user-experience-report|website=Chrome User Experience Report|publisher=Google Inc.|title=Chrome UX Report }}</ref> Google Chrome's Elizabeth Sweeny and Addy Osmani lead PageSpeed Insights and announced its support for Core Web Vitals in 2020.<ref>{{cite web|url=https://web.dev/vitals-tools-2020/|website=Web Vitals Tools|publisher=Google Inc.|title=Tools to measure Core Web Vitals }}</ref> |
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* '''Lab Data:''' Collected in a controlled environment using Lighthouse to simulate user experience. Useful for debugging performance issues. |
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* '''Field Data:''' Real-world user experience data gathered from the [https://developer.chrome.com/docs/crux Chrome User Experience Report (CrUX) dataset]. This data includes metrics like First Contentful Paint (FCP), Largest Contentful Paint (LCP), Interaction to Next Paint (INP), and Cumulative Layout Shift (CLS). |
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'''Real-User Experience Data''' |
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PSI leverages CrUX data to provide insights into real user experiences. It reports on various metrics over a 28-day period, including: |
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* '''First Contentful Paint (FCP):''' Time taken for the first content to render on the page. |
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* '''Largest Contentful Paint (LCP):''' Time taken for the main content of the page to render. |
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* '''Interaction to Next Paint (INP):''' Time taken for the page to become interactive after the user interacts with it. |
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* '''Cumulative Layout Shift (CLS):''' Measures the amount of unexpected layout shift a user experiences during page load. |
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* '''Time to First Byte (TTFB) (Experimental):''' Time taken for the browser to receive the first byte of response from the server. |
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* '''First Input Delay (FID) (Deprecated):''' Measures the time it takes for a user interaction to be reflected on the page (no longer recommended by Google). |
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PSI classifies these metrics into three categories based on Web Vitals thresholds: Good, Needs Improvement, and Poor. |
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'''Core Web Vitals''' |
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A subset of the field data metrics, '''[https://web.dev/explore/learn-core-web-vitals Core Web Vitals]''', are critical for a good user experience. These include LCP, INP, and CLS. PSI analyzes these metrics to determine if a page meets the Core Web Vitals assessment criteria. These are also used as a [https://developers.google.com/search/blog/2023/04/page-experience-in-search#are-core-web-vitals-still-important SEO ranking signal]. |
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'''Lab Diagnostics''' |
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PSI uses [[Google Lighthouse|Lighthouse]] to analyze a web page in a simulated environment. It provides scores and recommendations for various categories like Performance, Accessibility, Best Practices, and SEO. The Performance category includes metrics like FCP, LCP, CLS, and Time to Interactive, each with scores and improvement suggestions. |
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'''Overall, PSI is a valuable tool for website owners and developers to identify performance bottlenecks and improve the user experience of their web pages.''' |
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==PageSpeed Chrome Extension== |
==PageSpeed Chrome Extension== |
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==PageSpeed Service== |
==PageSpeed Service== |
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PageSpeed service was a commercial product, provided by Google Inc. The service was offered free of charge |
PageSpeed service was a commercial product, provided by Google Inc. The service was offered free of charge since it was still officially in beta version. Service included all Pagespeed Module optimizations and use of Google servers’ infrastructure.<ref>{{cite web|last1=Lardinois|first1=Frederic|title=Google Updates PageSpeed Service, Promises To "Turbocharge Your Website"|url=https://techcrunch.com/2012/08/03/google-updates-pagespeed-service-promises-to-turbocharge-your-website/|access-date=23 March 2015|website=techcrunch.com|date=3 August 2012 |publisher=The Tech Crunch}}</ref> Google announced the deprecation of PageSpeed service on 5 May 2015<ref>{{cite web|url=https://groups.google.com/forum/#!topic/page-speed-service-discuss/h4jyUpv6Bc8|title=Google Groups|website=groups.google.com|access-date=7 February 2019}}</ref> and turned it off on 3 August 2015.<ref>{{cite web|url=https://developers.google.com/speed/pagespeed/service/Deprecation|title=Turndown information for PageSpeed Service - PageSpeed Service|website=Google Developers|access-date=7 February 2019}}</ref> |
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PageSpeed is now a critical tool for businesses looking to rank their website on search engines organically, given that 47% of users abandon websites that take longer than 2 seconds to load. <ref>{{Cite web |last=Dentten |first=Will |date=Dec 6, 2024 |title=Google Pagespeed Insights: Why Is It Important |url=https://www.testvalleydigital.com/blog/google-pagespeed-insights-why-is-it-important/ |website=Test Valley Digital}}</ref> |
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==See also== |
==See also== |
Latest revision as of 12:45, 10 December 2024
This article has multiple issues. Please help improve it or discuss these issues on the talk page. (Learn how and when to remove these messages)
|
Google PageSpeed is a family of tools by Google, Inc.[1] designed to help optimize website performance.[2] It was introduced at a Developer Conference in 2010.[3][4] There are four main components of PageSpeed family tools:
- PageSpeed Module (consisting of mod PageSpeed[5] for the Apache HTTP Server and NGX PageSpeed[6] for the Nginx)[7]
- PageSpeed Insights
- PageSpeed Service
- PageSpeed Chrome DevTools extension. These components aim to identify and automatically correct deviations from Google's Web Performance Best Practices.
PageSpeed Modules
[edit]The PageSpeed Modules are the open-source Apache HTTP Server or Nginx web server modules, which automatically apply chosen filters to pages, associated assets (like stylesheets, JavaScript, and HTML files), as well as to images and website cache requirements. These modules do not require modifications to existing content or workflow,[8] meaning that all internal optimizations and changes to files are made on the server side, and present modified files directly to the user. Each of the 40+ filters corresponds to one of Google's web performance best practices rules.
Since the PageSpeed module is an open-source library, it is frequently updated by numerous developers worldwide. It can be deployed by any individual site, hosting providers, or CDNs.[9]
The installation can be done in two ways: from packages or built from source on the following supported platforms:
Ports
[edit]Other servers that offer a PageSpeed optimization module based on Google's Page Speed SDK:
- Apache Traffic Server - ATS page speed[10]
- Microsoft Internet Information Services - IIS WebSpeed[11]
Filters
[edit]PageSpeed module filters are settings, based on which a web page optimization rule is applied. They can be divided into five main categories:
- Stylesheets optimizations
- Javascript files optimizations
- Images optimizations
- HTML optimizations
- Tracking activity filters
Speed impact
[edit]The PageSpeed Module showed the most significant impact on decreasing web page loading times, payload size, and number of requests compared to other industry options. According to several researchers, 'mod_pagespeed' can reduce loading times by up to 80%, the number of bytes on a wire can be decreased by 30%, and the number of total requests can drop by over 20%. Since many search engines, including Google, employ a ranking algorithm that is affected by a page's loading speed, these optimizations can impact a website's placement in search results.[12][13] As of February 2015, Google has begun testing “Slow” labels on mobile devices[14] for websites that exceed a certain amount of loading time, prompting developers to examine ways to increase a page's load speed.
Google estimates that for every delay in mobile page load time, the conversion rate drops by 20%.[15]
PageSpeed Insights (PSI)
[edit]PageSpeed Insights (PSI) is a free tool from Google that analyzes the performance of a web page on both mobile and desktop devices. It provides suggestions on how to improve the page's speed and overall user experience.
Data and Metrics
PSI utilizes two main types of data:
- Lab Data: Collected in a controlled environment using Lighthouse to simulate user experience. Useful for debugging performance issues.
- Field Data: Real-world user experience data gathered from the Chrome User Experience Report (CrUX) dataset. This data includes metrics like First Contentful Paint (FCP), Largest Contentful Paint (LCP), Interaction to Next Paint (INP), and Cumulative Layout Shift (CLS).
Real-User Experience Data
PSI leverages CrUX data to provide insights into real user experiences. It reports on various metrics over a 28-day period, including:
- First Contentful Paint (FCP): Time taken for the first content to render on the page.
- Largest Contentful Paint (LCP): Time taken for the main content of the page to render.
- Interaction to Next Paint (INP): Time taken for the page to become interactive after the user interacts with it.
- Cumulative Layout Shift (CLS): Measures the amount of unexpected layout shift a user experiences during page load.
- Time to First Byte (TTFB) (Experimental): Time taken for the browser to receive the first byte of response from the server.
- First Input Delay (FID) (Deprecated): Measures the time it takes for a user interaction to be reflected on the page (no longer recommended by Google).
PSI classifies these metrics into three categories based on Web Vitals thresholds: Good, Needs Improvement, and Poor.
Core Web Vitals
A subset of the field data metrics, Core Web Vitals, are critical for a good user experience. These include LCP, INP, and CLS. PSI analyzes these metrics to determine if a page meets the Core Web Vitals assessment criteria. These are also used as a SEO ranking signal.
Lab Diagnostics
PSI uses Lighthouse to analyze a web page in a simulated environment. It provides scores and recommendations for various categories like Performance, Accessibility, Best Practices, and SEO. The Performance category includes metrics like FCP, LCP, CLS, and Time to Interactive, each with scores and improvement suggestions.
Overall, PSI is a valuable tool for website owners and developers to identify performance bottlenecks and improve the user experience of their web pages.
PageSpeed Chrome Extension
[edit]Pagespeed extension is an extension of Chrome Browser and is a part of Google Chrome Developer Tools. Visitors who use PageSpeed regularly can view all given metrics by PageSpeed Insights directly in a browser and download webpage resources, optimized according to web performance best practices. It has now been deprecated[16] and Google recommends the online version be used instead.
PageSpeed Service
[edit]PageSpeed service was a commercial product, provided by Google Inc. The service was offered free of charge since it was still officially in beta version. Service included all Pagespeed Module optimizations and use of Google servers’ infrastructure.[17] Google announced the deprecation of PageSpeed service on 5 May 2015[18] and turned it off on 3 August 2015.[19]
PageSpeed is now a critical tool for businesses looking to rank their website on search engines organically, given that 47% of users abandon websites that take longer than 2 seconds to load. [20]
See also
[edit]References
[edit]- ^ "About PageSpeed Insights". Google Developers. Retrieved 2022-08-13.
- ^ Ivanovs, Alex (16 April 2014). "PageSpeed Module: Improving Your Websites' Performance". huffingtonpost.com/. The Huffington Post. Retrieved 23 March 2015.
- ^ Kerner, Sean Michael (4 November 2010). "Google Speeds Up the Web with Apache Web Server Module". serverwatch.com/news/. Retrieved 23 March 2015.
- ^ Ram, Ramani (2011-07-29). "Page Speed Service: Web performance, delivered". googlecode.blogspot.com/. Retrieved 17 March 2015.
- ^ "Github". github.com. Google Inc. Retrieved 6 August 2020.
- ^ "Github". github.com. Google Inc. Retrieved 6 August 2020.
- ^ "Apache Incubator". modpagespeed.com/. Google Inc. Retrieved 6 August 2020.
- ^ Edwards, Ben (2014-07-28). "Authoring critical above-the-fold CSS". benedfit.com. Retrieved 23 March 2015.
- ^ "PageSpeed Insights SDK". code.google.com. Google Inc. Retrieved 23 March 2015.
- ^ "ats_pagespeed". iispeed.com/. IISpeed B.V. Archived from the original on 2015-05-25. Retrieved 2015-05-25.
- ^ "IIS WebSpeed". iiswebspeed.com/. IISpeed B.V.
- ^ Enge, Eric (2011-03-06). "Case Study: Impact of Code Cleanup on Site Traffic". searchenginewatch.com/. Search Engine Watch. Retrieved 23 March 2015.
- ^ Kuchler, Margaret (19 May 2011). "The Growing Need For Speed: How Site Performance Increasingly Influences Search Rankings". retailtouchpoints.com/. Retail Touch Points. Retrieved 23 March 2015.
- ^ Barry, Shwartz (2015-02-25). "Google Testing A Red "Slow" Label In The Search Results For Slower Sites". searchengineland.com/. Retrieved 17 March 2015.
- ^ "Mobile Page Load Delay Causes Conversion Loss". Think with Google. Retrieved 2024-05-23.
- ^ "PageSpeed Insights | PageSpeed Insights | Google Developers". Google Developers. Retrieved 2016-09-08.
- ^ Lardinois, Frederic (3 August 2012). "Google Updates PageSpeed Service, Promises To "Turbocharge Your Website"". techcrunch.com. The Tech Crunch. Retrieved 23 March 2015.
- ^ "Google Groups". groups.google.com. Retrieved 7 February 2019.
- ^ "Turndown information for PageSpeed Service - PageSpeed Service". Google Developers. Retrieved 7 February 2019.
- ^ Dentten, Will (Dec 6, 2024). "Google Pagespeed Insights: Why Is It Important". Test Valley Digital.