Bug 126166

Summary:	REGRESSION: fast/js/dfg-* typed array tests frequently time out on debug bots
Product:	WebKit	Reporter:	Alexey Proskuryakov <ap>
Component:	JavaScriptCore	Assignee:	Nobody <webkit-unassigned>
Status:	REOPENED ---
Severity:	Normal	CC:	barraclough, fpizlo, ggaren, jbedard, koivisto, webkit-bug-importer
Priority:	P2	Keywords:	InRadar
Version:	528+ (Nightly build)
Hardware:	Unspecified
OS:	Unspecified

Description Alexey Proskuryakov 2013-12-23 10:52:45 PST

http://webkit-test-results.appspot.com/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=js%2Fdfg-.*array.html

These tests were always slow, but bots very clearly claim that they became ~50% slower at around r160908 (lazy DOM tree creation patch). I know this doesn't seem related, but the numbers appear conclusive.

Even if not a true regression, we should do something to make these tests not time out on bots.

Comment 1 Alexey Proskuryakov 2014-01-22 11:50:12 PST

It appears that these tests are over 30x slower in debug than in release - they don't show up on flakiness dashboard for release builds, which I believe means that they take under 1 second.

Skipped in http://trac.webkit.org/r162543 with Filip's blessing.

Comment 2 Radar WebKit Bug Importer 2014-01-22 11:50:39 PST

<rdar://problem/15883202>

Comment 3 Alexey Proskuryakov 2014-12-19 11:59:19 PST

This doesn't happen any more.

Comment 4 Jonathan Bedard 2016-09-16 16:30:22 PDT

These tests remain slow, although they shouldn't time out.

Another possible approach, given that all of the tests in question generate large arrays and preform computations on them, would be to simply decrease the size of the arrays the tests use.