Bug 125952

Summary:

REGRESSION(r155201): 13-14% on Dromaeo/jslib-style-prototype and 3-4% on jslib-modify-prototype

Product:

WebKit

Reporter:

Ryosuke Niwa <rniwa>

Component:

JavaScriptCore

Assignee:

Nobody <webkit-unassigned>

Status:

NEW

Severity:

Normal

CC:

barraclough, fpizlo, ggaren, mhahnenberg, oliver, webkit-bug-importer

Priority:

Keywords:

InRadar

Version:

528+ (Nightly build)

Hardware:

Unspecified

OS:

Unspecified

Attachments:

Description	Flags
Perf test results	none

Ryosuke Niwa

Reported 2013-12-18 14:10:31 PST

https://perf.webkit.org/#mode=charts&chartList=%5B%5B%22mac-lion%22%2C%22Dromaeo%2Fjslib-modify-prototype%3ARuns%22%5D%2C%5B%22mac-mountainlion%22%2C%22Dromaeo%2Fjslib-modify-prototype%3ARuns%22%5D%5D&days=168&zoom=%5B1377934353465.6045%2C1379239368520.3296%5D WebKit: http://trac.webkit.org/log/?rev=155207&stop_rev=155196&verbose=on

Attachments
Perf test results (46.26 KB, text/html) 2014-01-07 01:31 PST, Ryosuke Niwa	no flags	Details
View All Add attachment proposed patch, testcase, etc.

Ryosuke Niwa

Comment 1 2013-12-18 14:20:57 PST

Also regressed Dromaeo/jslib-style-prototype by 12-13%! https://perf.webkit.org/#mode=charts&chartList=%5B%5B%22mac-mountainlion%22%2C%22Dromaeo%2Fjslib-style-prototype%3ARuns%22%5D%2C%5B%22mac-lion%22%2C%22Dromaeo%2Fjslib-style-prototype%3ARuns%22%5D%5D&days=227&zoom=%5B1377861956112.884%2C1379566406980.915%5D

Radar WebKit Bug Importer

Comment 2 2013-12-20 13:12:53 PST

<rdar://problem/15711024>

Ryosuke Niwa

Comment 3 2014-01-07 01:31:03 PST

Bisected locally. It appears that this regression is caused by http://trac.webkit.org/changeset/155201. Perhaps one of these tests is encountering a horrible performance cliff the patch talks about.

Ryosuke Niwa

Comment 4 2014-01-07 01:31:24 PST

Created attachment 220501 [details] Perf test results

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