Bug 100794

Summary:	Enable complex-text measuring optimization for platforms using HarfBuzz
Product:	WebKit	Reporter:	Eric Seidel (no email) <eric>
Component:	Layout and Rendering	Assignee:	Nobody <webkit-unassigned>
Status:	RESOLVED WONTFIX
Severity:	Normal	CC:	bashi, eae, efidler, leviw, tonyg
Priority:	P2
Version:	528+ (Nightly build)
Hardware:	Unspecified
OS:	Unspecified
Bug Depends on:	102603, 98317, 113243
Bug Blocks:

Description Eric Seidel (no email) 2012-10-30 16:13:29 PDT

Enable complex-text measuring optimization for platforms using HarfBuzz

Harfbuzz was explicitly excluded from:
http://trac.webkit.org/changeset/130851

Due to a fast/text/shaping/shaping-selection-rect.html regression:
https://bugs.webkit.org/show_bug.cgi?id=98317#c29

Enabling this is a 10% win for line layout.  Those don't come along very often. :)

Comment 1 Eli Fidler 2013-05-03 14:18:18 PDT

It seems like this is enabled unconditionally these days.

Comment 2 Eric Seidel (no email) 2013-05-21 23:44:47 PDT

I believe HarfBuzz was chromium-only.  And I believe this is either already done, or tracked separately in teh chromium issue tracker.