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ladybird/Libraries/LibJS
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Aliaksandr Kalenik bb53485dea LibJS+LibWeb: Add fast path for builtin iterators in iterator_step() 
We already have fast path for built-in iterators that skips `next()`
lookup and iteration result object allocation applied for `for..of` and
`for..in` loops. This change extends it to `iterator_step()` to cover
`Array.from()`, `[...arr]` and many other cases.

Makes following function go 2.35x faster on my computer:
```js
(function f() {
  let arr = [1, 2, 3, 4, 5, 6, 7, 8, 9, 10];
  for (let i = 0; i < 1000000; i++) {
    let [a, ...rest] = arr;
  }
})();
```
2025-05-13 15:14:25 +03:00
..
Bytecode LibJS: Make generate_labelled_evaluation non-virtual if possible 2025-05-12 11:40:45 -06:00
Contrib/Test262 LibJS: Use Value::to_byte_string() in fewer places 2025-03-28 12:31:40 -04:00
Heap LibGC+Everywhere: Factor out a LibGC from LibJS 2024-11-15 14:49:20 +01:00
Runtime LibJS+LibWeb: Add fast path for builtin iterators in iterator_step() 2025-05-13 15:14:25 +03:00
Tests LibJS: Disable optimization in IteratorNextUnpack if next() is redefined 2025-05-12 07:41:29 -04:00
AST.cpp LibJS: Preserve information about local variables declaration kind 2025-05-06 12:06:23 +02:00
AST.h LibJS: Make generate_labelled_evaluation non-virtual if possible 2025-05-12 11:40:45 -06:00
CMakeLists.txt LibJS: Implement rawJSON and isRawJSON functions 2025-04-24 09:33:49 -04:00
Console.cpp LibJS: Use FlyString in PropertyKey instead of DeprecatedFlyString 2025-03-24 22:27:17 +00:00
Console.h LibGC: Rename MarkedVector => RootVector 2024-12-26 19:10:44 +01:00
CyclicModule.cpp LibJS: Update spec steps / links for the import-assertions proposal 2025-04-29 07:33:08 -04:00
CyclicModule.h LibJS: Update spec steps / links for the import-assertions proposal 2025-04-29 07:33:08 -04:00
Forward.h LibJS: Allow advancing built-in iterators without result object creation 2025-04-30 20:51:39 +02:00
Lexer.cpp LibJS: Use FlyString in PropertyKey instead of DeprecatedFlyString 2025-03-24 22:27:17 +00:00
Lexer.h LibJS: Use FlyString in PropertyKey instead of DeprecatedFlyString 2025-03-24 22:27:17 +00:00
LocalVariable.h LibJS: Preserve information about local variables declaration kind 2025-05-06 12:06:23 +02:00
MarkupGenerator.cpp LibJS: Make Value() default-construct the undefined value 2025-04-05 11:20:26 +02:00
MarkupGenerator.h Everywhere: Hoist the Libraries folder to the top-level 2024-11-10 12:50:45 +01:00
Module.cpp LibJS: Mark sync module evaluation promise as handled 2025-05-05 17:50:18 +12:00
Module.h LibJS: Mark sync module evaluation promise as handled 2025-05-05 17:50:18 +12:00
ModuleLoading.h LibGC+Everywhere: Factor out a LibGC from LibJS 2024-11-15 14:49:20 +01:00
Parser.cpp LibJS: Preserve information about local variables declaration kind 2025-05-06 12:06:23 +02:00
Parser.h LibJS: Allow using local variable for catch parameters 2025-04-22 21:57:25 +02:00
ParserError.cpp LibJS: Use FlyString in PropertyKey instead of DeprecatedFlyString 2025-03-24 22:27:17 +00:00
ParserError.h LibJS: Use FlyString in PropertyKey instead of DeprecatedFlyString 2025-03-24 22:27:17 +00:00
Position.h LibJS: Cache source code positions more often 2024-12-02 11:42:11 +01:00
Print.cpp LibCore+LibJS+LibWasm: Always use a real format string 2025-04-08 20:00:18 -04:00
Print.h Everywhere: Hoist the Libraries folder to the top-level 2024-11-10 12:50:45 +01:00
Script.cpp LibGC+Everywhere: Factor out a LibGC from LibJS 2024-11-15 14:49:20 +01:00
Script.h LibJS+LibWeb: Add fast_is<T> helpers for HTML::Script class family 2025-04-18 14:45:56 +02:00
SourceCode.cpp LibJS: Cache source code positions more often 2024-12-02 11:42:11 +01:00
SourceCode.h Everywhere: Hoist the Libraries folder to the top-level 2024-11-10 12:50:45 +01:00
SourceRange.h Everywhere: Hoist the Libraries folder to the top-level 2024-11-10 12:50:45 +01:00
SourceTextModule.cpp LibJS: Update spec steps / links for the import-assertions proposal 2025-04-29 07:33:08 -04:00
SourceTextModule.h LibJS: Update spec steps / links for the import-assertions proposal 2025-04-29 07:33:08 -04:00
SyntaxHighlighter.cpp LibJS+LibWebView: Treat trivia tokens as comments 2025-03-04 15:54:03 -05:00
SyntaxHighlighter.h Everywhere: Hoist the Libraries folder to the top-level 2024-11-10 12:50:45 +01:00
SyntheticModule.cpp LibJS: Update spec steps / links for the JSON modules proposal 2025-04-29 07:33:08 -04:00
SyntheticModule.h LibJS: Update spec steps / links for the JSON modules proposal 2025-04-29 07:33:08 -04:00
Token.cpp Everywhere: Hoist the Libraries folder to the top-level 2024-11-10 12:50:45 +01:00
Token.h LibJS: Use FlyString in PropertyKey instead of DeprecatedFlyString 2025-03-24 22:27:17 +00:00