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Questions tagged [webpagetest]

WebPageTest refers to performance testing of web pages by usage of the infrastructure of webpagetest.org or similar self-hosted infrastructure.

Webpagetest(WPT) was created originally at AOL by Patrick Meenan in 2008 and is now backed by prominent technology companies like Google. WebPageTest(WPT) is the swiss army knife for measuring your site's performance. WPT is FREE and open sourced under the free BSD license!

At its most basic level, WPT measures how a particular web page loads. As the page loads, a number of useful metrics are captured, cataloged and then displayed in various charts,graphs and tables which are useful for spotting performance delays. These metrics and visuals can help solving important performance related issues. WPT has tools to analyze lot of things and some important metrics are the platform to use (desktop vs mobile), browser of interest (Chrome, Firefox, IE, etc), and even the geographic location. There are lot of other tools available as well.

More information can be found in their official site.

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Performance issue because of Google Adwords

I want to improve performance of website, and currently I got stuck with Google Adwords problem. I have already speeded it (website) up from ~4 seconds to ~1.8 seconds but now webpagetest.org run on this website looks that: Step by step (excluding…
Michał Kutra
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How to upload the video generated by WebPageTest

I use WebPageTest to analyze web site quality. In interactive mode, the activity can be recorded and viewed later in flv video format. Is it possible to upload this video through the WebPageTest rest api ?
D Cruette
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Running headless chrome on Ubuntu

I am trying to run headless Chrome using the following command on Ubuntu. sudo -u test xvfb-run --server-args='-screen 0, 1024x768x16' google-chrome -start-maximized --disable-fre --enable-benchmarking --metrics-recording-only…
station
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Java testing client for WebPagetest

I'm trying to include WebPagetest tests as a part of my continuous integration process. In other words I'd like to have broken build whenever a critical performance metric is out of range. WebPagetest provides restful API to drive it. Most of my…
wheleph
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webpagetest agent, how to start, stop and configure it?

The installation instructions for the universal webpagetest agent is here: https://github.com/WPO-Foundation/wptagent-install However, here is no documentation on how to: start the agent stop the agent see if the agent is running configure the…
John Little
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webpagetest private install, how to link the server with agent NOT using AWS

Unfortunately, although the webpagetest documentation for installation of private instances here https://docs.webpagetest.org/private-instances/ tells you how to install the server and the client, the information on how to link the two is missing,…
John Little
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webpagetest server install fails for Ubuntu 18.04.6 LTS "cannot stat /proc/sys/net/ipv4/tcp_window_scaling: No such file or directory"

Im trying to install webpagetest open source from here: https://github.com/WPO-Foundation/wptserver-install Which is basically this command: bash <(curl -s https://raw.githubusercontent.com/WPO-Foundation/wptserver-install/master/ubuntu.sh) However,…
John Little
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Webpagetest open source, can both server and client be installed on a single linux server?

Webpagetest offer a hosted service, but they dont support the countries I need to test. I was going to setup WPT on a VPS linux server in the target country, but I cant find any installation instructions for the "client", only the server. There are…
John Little
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Add Max-age to Big Commerce CDN Images

I am currently running performance testing on my sites, all of which are hosted through Big Commerce (cornerstone theme, stencil). I am using webpagetest.org, and under the performance section, there is a metric "Leverage browser caching of static…
alexispsc
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Deferred script is still render blocking according to webpagetest

I am using webpack to build the assets in production. The split chunking feature allows us to break big scripts into chunks. However the problem is that even though the scripts are deferred, webpagetest still shows they are render blocking: The…
Rabin Poudyal
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How to debug and fix Largest Contentful Paint LCP probem due to div with text loaded in initial HTML document?

The Largest Contentful Paint (LCP) score varies around 2.5s to 2.7s for below web page, as per both Lighthouse report from Chrome Incognito as well as WebPageTest.org. Web Page with this LCP problem =…
gsinha
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Webpagetest's Lighthouse: field or lab?

Webpagetest.org offers "own" Lighthouse test. It can run as a part of the general WPT test or as a standalone test from the URL /lighthouse. My question: is the WPT's Lighthouse test a LAB or a FIELD ? I've got this question because of the following…
Evgeniy
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WebPageTest shows no static cache but I got 304 response in repeated run

I am testing my webpage with webpagetest.org On my page, there are a bunch of images. I can see them well cached in the repeated run: (304 response is marked as yellow in WebPageTest waterfall result) However, in cache static content, there's no…
sdym
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NGINX redirect http to https (problem reducing first-byte-time)

I'm trying to reduce the first byte time (as suggested on Webpagestes https://www.webpagetest.org/result/201202_DiP2_982dc037a5d98317f825d72cba0910a9/1/details/#waterfall_view_step1) does anyone know why the http call takes so long? And why it has…
Andrew_de
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Automate WebPageTest

I have created a web application that will have to operate under a heavy client load, so I was planning to test it out with automated services, yet I don't seem to be able to find any. In essence, I am looking for a way to imitate real requests from…
andriy
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