Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: 4e349ca18c0f8e55b6bdcd2786755caf68787143
https://github.com/WebKit/WebKit/commit/4e349ca18c0f8e55b6bdcd2786755caf68787143
Author: Yusuke Suzuki <[email protected]>
Date: 2024-03-04 (Mon, 04 Mar 2024)
Changed paths:
M Source/WTF/wtf/Vector.h
M Source/WTF/wtf/text/StringView.h
M Source/WebCore/editing/cocoa/DataDetection.mm
M Source/WebCore/platform/graphics/GlyphBuffer.h
M Source/WebCore/platform/graphics/coretext/FontCoreText.cpp
M Source/WebCore/platform/text/cocoa/LocaleCocoa.h
M Source/WebCore/platform/text/cocoa/LocaleCocoa.mm
M Tools/TestWebKitAPI/Tests/WTF/Vector.cpp
Log Message:
-----------
[WebCore] Optimize Font::applyTransforms
https://bugs.webkit.org/show_bug.cgi?id=270406
rdar://123961009
Reviewed by Chris Dumez.
Font::applyTransforms is very slow. While the most of time is used in CoreText,
the other part is also using much time!
This patch optimizes it.
1. We add Vector::insertFill function to insert one-item-filling into Vector.
GlyphBuffer is
doing this in a very inefficient way right now: allocating filled Vector and
using insertVector.
2. Add size parameter to upconvertedCharacters and use 256 for static Vector
size in Font::applyTransforms,
to avoid unnecessary allocations.
3. LocaleCocoa::canonicalLanguageIdentifierFromString should return
RetainPtr<CFStringRef>. We found that
we are super repeatedly creating CFString when locale is specified because
canonicalLanguageIdentifierFromString
returns AtomString and we convert it to CFString. And this is very slow.
Because canonicalLanguageIdentifierFromString
is only used in this place, we should just return RetainPtr<CFStringRef>.
Also we optimized the caching mechanism
in canonicalLanguageIdentifierFromString to cache the one item out of
HashMap since this one-item cache can cover almost
all cases.
* Source/WTF/wtf/Vector.h:
(WTF::Malloc>::insertFill):
* Source/WTF/wtf/text/StringView.h:
(WTF::StringView::upconvertedCharacters const):
(WTF::StringView::UpconvertedCharacters<N>::UpconvertedCharacters):
(WTF::StringView::UpconvertedCharacters::UpconvertedCharacters): Deleted.
* Source/WebCore/editing/TextIterator.cpp:
* Source/WebCore/platform/graphics/GlyphBuffer.h:
(WebCore::GlyphBuffer::makeHole):
* Source/WebCore/platform/graphics/coretext/FontCoreText.cpp:
(WebCore::Font::applyTransforms const):
* Source/WebCore/platform/text/cocoa/LocaleCocoa.h:
* Source/WebCore/platform/text/cocoa/LocaleCocoa.mm:
(WebCore::localeCache):
(WebCore::LocaleCocoa::canonicalLanguageIdentifierFromString):
(WebCore::LocaleCocoa::releaseMemory):
(WebCore::canonicalLocaleMap): Deleted.
Canonical link: https://commits.webkit.org/275676@main
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