Branch: refs/heads/main
Home: https://github.com/WebKit/WebKit
Commit: 0be0c1aae00476d4a368ff306fd9fa0d56509d50
https://github.com/WebKit/WebKit/commit/0be0c1aae00476d4a368ff306fd9fa0d56509d50
Author: Yusuke Suzuki <[email protected]>
Date: 2024-08-12 (Mon, 12 Aug 2024)
Changed paths:
M Source/JavaScriptCore/dfg/DFGByteCodeParser.cpp
Log Message:
-----------
[JSC] Make non CoW array DFG node when it is almost always modified and it is
empty array
https://bugs.webkit.org/show_bug.cgi?id=277658
rdar://133253298
Reviewed by Yijia Huang.
If CoW empty array's profile tells us that it seems that resulted array will be
modified anyway,
we should stop generating CoW array from this site. This is common pattern
since the pattern like
this is very common.
```
var array = [];
for (var i = 0; i < target.length; ++i) {
...
array.push(...);
}
```
* Source/JavaScriptCore/dfg/DFGByteCodeParser.cpp:
(JSC::DFG::ByteCodeParser::parseBlock):
Canonical link: https://commits.webkit.org/282120@main
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