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LibJS: Cache commonly used FlyStrings in the VM

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Roughly 7% of test-js runtime was spent creating FlyStrings from string
literals. This patch frontloads that work and caches all the commonly
used names in LibJS on a CommonPropertyNames struct that hangs off VM.
This commit is contained in:
Andreas Kling 2020-10-13 23:49:19 +02:00
parent 9f6c5f68b6
commit 7b863330dc
45 changed files with 651 additions and 392 deletions
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3
Libraries/LibJS/Runtime/Uint8ClampedArray.cpp
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@ -40,7 +40,8 @@ Uint8ClampedArray::Uint8ClampedArray(u32 length, Object& prototype)
: Object(prototype)
, m_length(length)
{
define_native_property("length", length_getter, nullptr);
auto& vm = this->vm();
define_native_property(vm.names.length, length_getter, nullptr);
m_data = new u8[m_length];
}