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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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7
Libraries/LibJS/Runtime/Value.cpp
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@ -738,7 +738,7 @@ Value ordinary_has_instance(GlobalObject& global_object, Value lhs, Value rhs)
return Value(false);
Object* lhs_object = &lhs.as_object();
auto rhs_prototype = rhs_function.get("prototype");
auto rhs_prototype = rhs_function.get(vm.names.prototype);
if (vm.exception())
return {};
@ -1013,8 +1013,9 @@ TriState abstract_relation(GlobalObject& global_object, bool left_first, Value l
size_t length_of_array_like(GlobalObject& global_object, Value value)
{
ASSERT(value.is_object());
auto result = value.as_object().get("length");
if (global_object.vm().exception())
auto& vm = global_object.vm();
auto result = value.as_object().get(vm.names.length);
if (vm.exception())
return 0;
return result.to_size_t(global_object);
}