Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: fb30ea0502c628aa0c469505cc754deac4b767c6
https://github.com/WebKit/WebKit/commit/fb30ea0502c628aa0c469505cc754deac4b767c6
Author: Xabier Rodriguez-Calvar <[email protected]>
Date: 2025-09-24 (Wed, 24 Sep 2025)
Changed paths:
M Source/WTF/wtf/Vector.h
Log Message:
-----------
[WTF] Fix performance when creating Vectors from different constness
https://bugs.webkit.org/show_bug.cgi?id=299008
Reviewed by Chris Dumez.
For example, when you try to create a Vector<uint8_t> from a span<const
uint8_t>, templates will consider both types
different and even when you pass true to the template, the second
VectorCopier::uninitializedCopy function will be used
and will defer to the slow version.
My use case was in MSE, creating a SharedBuffer implies creating a
FragmentedSharedBuffer and then a DataSegment that
implicitly creates a Vector<uint8_t> from a span<const uint8_t>. If you're
copying 2.5MB, time is reduced to 33% of the
initial one.
* Source/WTF/wtf/Vector.h:
Canonical link: https://commits.webkit.org/300464@main
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