Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: 4135fdaadd966813364a321d07ab051824c9082c
https://github.com/WebKit/WebKit/commit/4135fdaadd966813364a321d07ab051824c9082c
Author: Chris Dumez <[email protected]>
Date: 2026-01-06 (Tue, 06 Jan 2026)
Changed paths:
M Source/WTF/wtf/text/StringCommon.h
Log Message:
-----------
Micro-optimize `WTF::equal(const CharacterType* a, std::span<const
CharacterType> b)`
https://bugs.webkit.org/show_bug.cgi?id=304919
Reviewed by Yusuke Suzuki.
Micro-optimize `WTF::equal(const CharacterType* a, std::span<const
CharacterType> b)`
as recommended by Claude AI.
Here are micro-benchmark results:
Length Original (ns) Optimized (ns) Speedup Improvement
----------------------------------------------------------------------
2 1.80 1.58 1.141x +12.3%
3 1.60 1.58 1.008x +0.8%
4 1.59 1.58 1.004x +0.4%
5 1.58 1.58 0.999x -0.1%
6 1.58 1.57 1.006x +0.6%
7 1.57 1.57 1.001x +0.1%
8 1.57 1.57 1.001x +0.1%
9 1.65 1.62 1.018x +1.7%
12 1.57 1.58 0.997x -0.3%
16 1.57 1.57 1.001x +0.1%
17 1.56 1.57 0.990x -1.0%
20 1.57 1.58 0.993x -0.7%
24 1.58 1.57 1.007x +0.7%
32 1.59 1.57 1.013x +1.3%
33 1.66 1.62 1.022x +2.1%
40 1.67 1.64 1.019x +1.9%
48 1.70 1.61 1.054x +5.2%
64 1.83 1.63 1.123x +10.9%
65 1.83 1.70 1.074x +6.9%
80 2.11 1.72 1.225x +18.3%
100 2.36 2.20 1.072x +6.8%
128 2.96 2.53 1.173x +14.7%
256 5.37 4.79 1.122x +10.8%
512 9.67 8.79 1.100x +9.1%
1024 18.93 16.69 1.134x +11.8%
2048 46.76 37.97 1.231x +18.8%
4096 86.65 76.17 1.138x +12.1%
----------------------------------------------------------------------
Average speedup: 1.136x
Total improvement: 12.0%
* Source/WTF/wtf/text/StringCommon.h:
(WTF::equal):
Canonical link: https://commits.webkit.org/305181@main
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