661948 - JSBench: capturing buggy executions

Status: RESOLVED INCOMPLETE

(Core :: JavaScript Engine, defect)

Description

[Brian Hackett [Laid off!]]

It would be really good to experiment with JSBench to see if we can transform websites that exhibit buggy behavior into shell tests which exhibit the same bugs.  One possible website to try out is the AWFY breakdown page:

http://arewefastyet.com/?a=b&view=breakdown

This consistently renders correctly for me with TI off, and incorrectly for some of the benchmarks with TI on.  Presumably the JS behavior diverges at some point with some combination of options.  The content here is pretty static, no https or XMLHttpRequest or anything, and it's our website so we can make a new page with modified content if need be.

Comment 1

[Brian Hackett [Laid off!]]

Will use bug 660208 to track the AWFY breakage.  I tried recording this webpage with JSBench earlier today.  It looked like the scripts that ran were recorded ok, but all the DOM side effect and preparation code between the boilerplate and geval() calls was missing so the scripts did not work on replay.  Need to figure out what's going on there.