Bug 119350

Summary:	Speed up moving cursor/selection up or down past non-renderered elements
Product:	WebKit	Reporter:	Ryosuke Niwa <rniwa>
Component:	HTML Editing	Assignee:	Nobody <webkit-unassigned>
Status:	RESOLVED DUPLICATE
Severity:	Normal	CC:	arpitabahuguna, darin, enrica, kling, koivisto
Priority:	P2	Keywords:	BlinkMergeCandidate
Version:	528+ (Nightly build)
Hardware:	Unspecified
OS:	Unspecified

Ryosuke Niwa

Reported 2013-07-31 13:43:34 PDT

Merge https://chromium.googlesource.com/chromium/blink/+/965746ed22a5e210eb8c33adf300deab9a9c8332 Skips calling firstPositionInOrBeforeNode when a node doesn't have a renderer, since there couldn't possibly be a visible position there. This was particularly wasteful when trying to move the cursor up when at the beginning of a document, as it did a O(n^2) scan through the document head. See bug for easy repro steps.

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Arpita Bahuguna

Comment 1 2013-08-19 04:33:02 PDT

http://trac.webkit.org/changeset/154274 fixes this issue.

Darin Adler

Comment 2 2013-08-19 08:47:31 PDT

*** This bug has been marked as a duplicate of bug 119882 ***

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