Incomplete waterfalls generated for custom error pages e.g. 404

[andydavies]

Sites frequently serve custom error pages e.g. https://www.bluefountainmedia.com/asd but WPT generates an incomplete waterfall for them e.g. http://webpagetest.org/result/190611_76_de3d66d1180ed32a753a1872c869ca31/

The traces contain the network requests, and for some sites the screenshots are more complete than others.

Guessing the HTTP Status code short-circuits the response processing somewhere

[nilskuhn]

Congratulation, I never had a customer with the budget to performance optimize an error page ;)
Well, if I think about it again, I had one load testing and scaling it...

[Nooshu]

There is now a workaround for this issue, as Pat has added a fix for the 'Minimum test duration' with 404 pages.

Results in:

Updating for reference. Minimum test duration has now been exposed to WPT scripting, so it is now possible to achieve the same results using:

setMinimumStepSeconds 2
navigate https://www.example.com/this-is-a-404-page