Stack Overflow
Stack Overflow

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.

63 questions
0
votes
0 answers

Synthetic performance AB test

I have deployed two versions of our singlepage web app: one master (A) and one branch where are some changes which can affect somehow load time (B). The change is usually some new feature on front-end, refactoring, small performance optimization,…
user2530120
  • 31
  • 2
0
votes
1 answer

Web performance: distant start render time

Why I have Start Render time so far? Why the browser waits with rendering when it has downloaded css and JS? My results: https://www.webpagetest.org/result/170518_GZ_13B6/ or https://www.webpagetest.org/result/170518_4Q_13B9/ Thanks for advices! :-)
Andrew Roark
  • 1
  • 2
0
votes
1 answer

Automate webpagetest API call once per day

I need a code that automatically tests my URL every day with the webpagetest.org API I'd like to do these tests with one Python script, run it once per day, and save the results to view later.
diem_L
  • 389
  • 5
  • 22
0
votes
0 answers

Unable to setup private instance of webpagetest tool

I am trying to setup webpagetest using the link https://sites.google.com/a/webpagetest.org/docs/private-instances Apache and PHP servers are running successful. I tried to check installation status using the link…
kudlatiger
  • 3,028
  • 8
  • 48
  • 98
0
votes
1 answer

Error 301 when running WebPageTest

i would like to use gulp-sitespeedio@0.0.8 to test my website with webpagetest. But I get an error on my console and I dont know why. Find anybody my fault? [20:16:26] Starting 'webpagetest:build'... [20:16:26] Analyze your site’s web…
miniemuff
  • 1
0
votes
1 answer

How to test a page with WebPageTest where the login is from a popup?

How can I test a page where I need to login through a popup? I am trying to do a performance test on this page: http://store.nike.com/us/en_us/ Now how can I test the login functionality through webpagetest where the login pops up. I am trying to…
Pritam Banerjee
  • 17,953
  • 10
  • 93
  • 108
0
votes
2 answers

WebPageTest :: How can Start Render be after the load event?

What can cause the start render to be delayed even after the load event has fired? Look at this webpagetest result
adardesign
  • 33,973
  • 15
  • 62
  • 84
0
votes
1 answer

How does WebPagetest measure load time?

I've been looking at the timing.navigation api and it looks like the standard way to measure the page load time is: timing.loadEventEnd - timing.navigationStart From the WebPagetest docs: The Load Time is measured as the time from the start of…
Dan
  • 1
  • 1
0
votes
2 answers

How CDN detection works in webpgatest

I did some performance optimization (and I test it with webpagetest.org) but I still have problem with CDN detection. It looks like on screen: All requests (except first which is http request for html) with red X icon in last column are: for…
Michał Kutra
  • 1,202
  • 8
  • 21
0
votes
1 answer

How to put a wait in between the execution of two functions in nodejs

Here is my code, in wpt.runtest function i am hitting some url and getting url in response, now i will use this url in my request function, but i need to wait for sometime as it takes some time before the data is available at the url which is to be…
Siddharth Sinha
  • 578
  • 2
  • 15
  • 35
0
votes
2 answers

undefined is not a valid uri or options object. in expressjs

I am using expressjs, after running the webapagetest I am storing the url which is in string format in a variable then I am using this variable in request node module to get the data from that url, but I am getting undefined is not a valid uri or…
Siddharth Sinha
  • 578
  • 2
  • 15
  • 35
0
votes
1 answer

How to parse http/https response and export it to a csv file

I have comma separated data from http/https response. I want to parse it and export it to csv so that i can give this csv data to dygraph.js to make charts out of it. Here is the node.js code i have written, it hits the url and gets data in string…
Siddharth Sinha
  • 578
  • 2
  • 15
  • 35
0
votes
2 answers

What does the domContentLoaded time means in webpagetest?

I've been reading a lot about jQuery.ready() will slow your page down. My website has a bunch of code running inside jQuery.ready() as many websites do.