[Webkit-unassigned] [Bug 118707] New: Improve performance of increasing HTMLSelectElement::length
bugzilla-daemon at webkit.org
bugzilla-daemon at webkit.org
Mon Jul 15 21:18:29 PDT 2013
https://bugs.webkit.org/show_bug.cgi?id=118707
Summary: Improve performance of increasing
HTMLSelectElement::length
Product: WebKit
Version: 528+ (Nightly build)
Platform: Unspecified
OS/Version: Unspecified
Status: NEW
Keywords: BlinkMergeCandidate
Severity: Normal
Priority: P2
Component: Forms
AssignedTo: webkit-unassigned at lists.webkit.org
ReportedBy: rniwa at webkit.org
CC: koivisto at iki.fi, tkent at chromium.org,
benjamin at webkit.org, akling at apple.com,
jonlee at apple.com
Consider merging https://chromium.googlesource.com/chromium/blink/+/c0f9edf107acd697011236dfe9855141b59e18a2
It was possible that a CSS ruleset made update of HTMLSelectElement::length
O(N^2). This CL improve it to O(N) by AttachLazily.
Before Blink r153385, fast/forms/select-max-length.html took 3.8s on my machine.
After Blink r153385, it took 20s.
After this CL, it will take 1.8s.
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