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LibJS: Avoid ByteBuffer copying in NumericToRawBytes

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Another 4% speed-up on Octane/gbemu.js :^)
This commit is contained in:
Andreas Kling 2023-10-05 12:38:15 +02:00
parent 285484874d
commit 3fb406b97e
2 changed files with 16 additions and 11 deletions
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6
Userland/Libraries/LibJS/Runtime/AtomicsObject.cpp
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@ -228,10 +228,12 @@ static ThrowCompletionOr<Value> atomic_compare_exchange_impl(VM& vm, TypedArrayB
constexpr bool is_little_endian = AK::HostIsLittleEndian;
// 11. Let expectedBytes be NumericToRawBytes(elementType, expected, isLittleEndian).
auto expected_bytes = MUST_OR_THROW_OOM(numeric_to_raw_bytes<T>(vm, expected, is_little_endian));
auto expected_bytes = MUST(ByteBuffer::create_uninitialized(sizeof(T)));
numeric_to_raw_bytes<T>(vm, expected, is_little_endian, expected_bytes);
// 12. Let replacementBytes be NumericToRawBytes(elementType, replacement, isLittleEndian).
auto replacement_bytes = MUST_OR_THROW_OOM(numeric_to_raw_bytes<T>(vm, replacement, is_little_endian));
auto replacement_bytes = MUST(ByteBuffer::create_uninitialized(sizeof(T)));
numeric_to_raw_bytes<T>(vm, replacement, is_little_endian, replacement_bytes);
// FIXME: Implement SharedArrayBuffer case.
// 13. If IsSharedArrayBuffer(buffer) is true, then