Current preferred WebPageTest setup

notes.md

Run using the excellent WebPageTest API wrapper for NodeJS by Marcel Duran, and $WPT_API_KEY as an environment variable.

Command

webpagetest test example.com -k $WPT_API_KEY -l "Dulles_MotoG" -y "custom" -D 100 -U 100 -Y 200 -r "5" -vpt

-k key -l location and device (Dulles being thinly place with a selection of mobile devices, at the time of writing) -y network -D download bandwidth. -U upload bandwidth -Y latency -r runs -v capture video -p private (don't include in WPT log) -t sensitive (discard headers and the script in the result)

Download bandwith is set to 100 and latency to 200 to mimic very harsh consistent but slow connectivity on 2G.

A less harsh version for a 3G connection:

webpagetest test wpt-script.txt -k $WPT_API_KEY -y "3G" -r "5" -vpt

Command for behind a log in

Ditch the location because scripting only works for Chrome (at the time of writing).

Scripting

setValue fills in the form data, targetted with attribute=value submitForm submits the form, targetted with attribute=value

wpt-script.txt

// Stop recording
logData	0

// bring up the login screen
navigate	example.com

// Start recording
logData	1

// log in
setValue	name=username	USERNAME
setValue	name=password	PASSWORD
submitForm	name=login