Pagespeed insights

PageSpeed Insights (PSI) scores have recently improved across the board. But the improvements have sầu nothing to vày with any changes made to lớn the websites experiencing better scores. The improvements happened over on Google’s side.

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PageSpeed Insights

PageSpeed Insights is a Google tool that provides reports on a trang web speed performance. The tool provides both sản phẩm điện thoại & desktop page speed reports along with actionable insights about different problems that were discovered.

PSI provides two kinds of reporting, lab datafield data.

Lab Data

Lab data is a report generated using simulated devices và Internet speeds. The purpose of testing a site using simulated environments is to lớn provide insights inkhổng lồ issues that may cause a slower user experience.


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Lab data can note code-màn chơi factors that can cause the user experience to lớn degrade and suggests ways to fix those problems.

The lab data is a way to lớn audit a website page và identify areas that need improving.

Field Data

Field data is information gathered through actual users browsing the site with Chrome & archived in the Chrome User Experience Report (CrUX).

Field data is useful for understanding what kind of performance site visitors are actually experiencing on the site under real-world environments.

The Core Web Vitals scores come from the field data archived in CrUX.

These metrics consist of Largest Contentful Paint, First Input Delay & Cumulative Layout Shift.


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The field data that is reported in the PageSpeed Insights tool is from a previous 28 day cycle. Recent changes lớn the trang web may not be reported in the field data portion of the report.

That’s why targeted improvements khổng lồ a website will not be reflected in the field data, particularly the Vi xử lý Core Web Vitals scores, until the next 28 day cycle is reported on.

Google Updated How PageSpeed Insights Gathers Data

Google announced an important change in how the PageSpeed Insights tools gathers information. The change is a switch khổng lồ using the http/2 protocol for connecting khổng lồ a web page.

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PageSpeed Insights Using HTTP/2

HTTP/2 is an advanced network connection protocol that allows faster transmission of data. Under the previous HTTP/1.x protocol there were limits lớn how much data could be transmitted, which led to various workarounds.

The HTTP/2 protocol does not have sầu those limitations.

According khổng lồ an HTTP/2 explainer published by Google:

“HTTP/2 modifies how the data is formatted (framed) & transported between the client and VPS, both of which manage the entire process, and hides all the complexity from our applications within the new framing layer.

As a result, all existing applications can be delivered without modification.”


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HTTP/2 allows faster transfer of data. That in turn improved the PageSpeed Insights scores across all metrics. The only hangup is if your hệ thống does not support HTTP/2.

It’s highly likely your VPS supports HTTP/2. If the VPS hosting your site does not tư vấn HTTP/2 you may want to consider calling your website host customer support & finding out how to lớn activate it.

There are many tools that chạy thử websites for HTTP/2 compatibility. Google’s Lighthouse tool goes further by reporting if third các buổi party resources loaded by a site that do not support HTTP/2.

HTTP/2 provides a performance boost for clients (browsers and crawlers) that tư vấn HTTP/2.


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That performance boost is why the PageSpeed Insights scores are going up across the board, because the PSI data is now gathered using the new faster protocol.

Google’s PageSpeed Insights Update Announcement

According lớn Google’s announcement:

“As of March 3, 2021, PageSpeed Insights uses http/2 khổng lồ make network requests, if the hệ thống supports it.

…With this change, network connections are often established quicker. Given your requests are served in h2, you can likely expect metrics and the performance score lớn improve sầu.

In general, performance scores across all PageSpeed Insights runs went up by a few points.”

PageSpeed Insights Scores are Now Higher

If you have been pleasantly surprised to see better PageSpeed Insights scores beginning March 3rd, this is the reason why. So don’t get a big head about it.


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KeyCDN HTTP/2 Testing Tool

Official Announcement of PSI Now Using HTTP/2

Chrome User Experience Report (CrUX)


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