Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: 0c0b2027ab6bc02c2c08fbde469af8d2e28da9d6
https://github.com/WebKit/WebKit/commit/0c0b2027ab6bc02c2c08fbde469af8d2e28da9d6
Author: Žan Doberšek <zdober...@igalia.com>
Date: 2022-12-12 (Mon, 12 Dec 2022)
Changed paths:
M Source/WebKit/Platform/IPC/ArgumentCoders.h
M Tools/TestWebKitAPI/Tests/IPC/ArgumentCoderTests.cpp
Log Message:
-----------
[WK2] Decoding in ArgumentCoder<Vector<T>> should reserve initial capacity,
avoid shrink-to-fit
https://bugs.webkit.org/show_bug.cgi?id=249077
Reviewed by Kimmo Kinnunen.
When decoding a Vector of non-trivial elements, use the decoded size to
reserve initial capacity and then perform unchecked appends of each
decoded element. This replaces the incremental grow-as-you-go appending
and the final shrink-to-fit operation which possibly ends up moving over
all the elements into the newly-allocated smaller buffer.
The decoding-moves-counter test is updated, with the only remaining and
unavoidable move of each element contained in the Vector happening when
that element is moved into the resulting Vector.
* Source/WebKit/Platform/IPC/ArgumentCoders.h:
* Tools/TestWebKitAPI/Tests/IPC/ArgumentCoderTests.cpp:
(TestWebKitAPI::TEST_F):
Canonical link: https://commits.webkit.org/257725@main
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