Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: 65bc0fda9edd68bc4a2de32a3fc6d9a668c165d5
https://github.com/WebKit/WebKit/commit/65bc0fda9edd68bc4a2de32a3fc6d9a668c165d5
Author: Chris Dumez <[email protected]>
Date: 2026-03-26 (Thu, 26 Mar 2026)
Changed paths:
M Source/WebCore/platform/SharedBuffer.cpp
Log Message:
-----------
utf8Buffer() in SharedBuffer.h allocates too much memory for 8-bit strings
https://bugs.webkit.org/show_bug.cgi?id=310770
Reviewed by Anne van Kesteren.
Latin1 characters (0x80-0xFF) encode as at most 2 UTF-8 bytes; ASCII
(0x00-0x7F) as 1 byte. So length * 2 is sufficient for 8-bit strings.
The 3x multiplier is only needed for 16-bit strings (a single BMP
codepoint can be 3 UTF-8 bytes). Additionally,
`Vector<uint8_t> buffer(length * 3)` zero-initializes the entire
allocation, so the waste is both allocation and initialization.
* Source/WebCore/platform/SharedBuffer.cpp:
(WebCore::utf8Buffer):
Canonical link: https://commits.webkit.org/309984@main
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