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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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14
Libraries/LibJS/Runtime/ErrorConstructor.cpp
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@ -31,15 +31,16 @@
namespace JS {
ErrorConstructor::ErrorConstructor(GlobalObject& global_object)
: NativeFunction("Error", *global_object.function_prototype())
: NativeFunction(vm().names.Error, *global_object.function_prototype())
{
}
void ErrorConstructor::initialize(GlobalObject& global_object)
{
auto& vm = this->vm();
NativeFunction::initialize(global_object);
define_property("prototype", global_object.error_prototype(), 0);
define_property("length", Value(1), Attribute::Configurable);
define_property(vm.names.prototype, global_object.error_prototype(), 0);
define_property(vm.names.length, Value(1), Attribute::Configurable);
}
ErrorConstructor::~ErrorConstructor()
@ -60,7 +61,7 @@ Value ErrorConstructor::construct(Function&)
if (vm.exception())
return {};
}
return Error::create(global_object(), "Error", message);
return Error::create(global_object(), vm.names.Error, message);
}
#define __JS_ENUMERATE(ClassName, snake_name, PrototypeName, ConstructorName) \
@ -70,9 +71,10 @@ Value ErrorConstructor::construct(Function&)
} \
void ConstructorName::initialize(GlobalObject& global_object) \
{ \
auto& vm = this->vm(); \
NativeFunction::initialize(global_object); \
define_property("prototype", global_object.snake_name##_prototype(), 0); \
define_property("length", Value(1), Attribute::Configurable); \
define_property(vm.names.prototype, global_object.snake_name##_prototype(), 0); \
define_property(vm.names.length, Value(1), Attribute::Configurable); \
} \
ConstructorName::~ConstructorName() { } \
Value ConstructorName::call() \