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LibJS: Add a fast path for setting valid u32 values in Uint32TypedArray

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The exisiting fast path only permits for valid i32 values.

On https://cyxx.github.io/another_js, this eliminates the runtime of
typed_array_set_element, and reduces the runtime of put_by_value from
11.1% to 7.7%.
This commit is contained in:
Timothy Flynn 2024-02-28 11:20:01 -05:00 • committed by Andreas Kling
commit 3d2794d062
Notes: sideshowbarker 2024-07-17 03:03:37 +09:00
1 changed files with 9 additions and 0 deletions
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9
Userland/Libraries/LibJS/Bytecode/CommonImplementations.h
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@ -443,6 +443,15 @@ inline ThrowCompletionOr<void> put_by_value(VM& vm, Value base, Value property_k
} }
} }
if (typed_array.kind() == TypedArrayBase::Kind::Uint32Array && value.is_integral_number()) {
auto integer = value.as_double();
if (AK::is_within_range<u32>(integer) && is_valid_integer_index(typed_array, canonical_index)) {
fast_typed_array_set_element<u32>(typed_array, index, static_cast<u32>(integer));
return {};
}
}
switch (typed_array.kind()) { switch (typed_array.kind()) {
#define __JS_ENUMERATE(ClassName, snake_name, PrototypeName, ConstructorName, Type) \ #define __JS_ENUMERATE(ClassName, snake_name, PrototypeName, ConstructorName, Type) \
case TypedArrayBase::Kind::ClassName: \ case TypedArrayBase::Kind::ClassName: \