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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
Notes: sideshowbarker 2024-07-19 01:54:41 +09:00 
Author: https://github.com/awesomekling
Commit: https://github.com/SerenityOS/serenity/commit/7b863330dc7
45 changed files with 651 additions and 392 deletions
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29
Libraries/LibJS/Runtime/ReflectObject.cpp
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@@ -63,7 +63,7 @@ static void prepare_arguments_list(GlobalObject& global_object, Value value, Mar
return;
}
auto& arguments_list = value.as_object();
auto length_property = arguments_list.get("length");
auto length_property = arguments_list.get(vm.names.length);
if (vm.exception())
return;
auto length = length_property.to_size_t(global_object);
@@ -84,21 +84,22 @@ ReflectObject::ReflectObject(GlobalObject& global_object)
void ReflectObject::initialize(GlobalObject& global_object)
{
auto& vm = this->vm();
Object::initialize(global_object);
u8 attr = Attribute::Writable | Attribute::Configurable;
define_native_function("apply", apply, 3, attr);
define_native_function("construct", construct, 2, attr);
define_native_function("defineProperty", define_property, 3, attr);
define_native_function("deleteProperty", delete_property, 2, attr);
define_native_function("get", get, 2, attr);
define_native_function("getOwnPropertyDescriptor", get_own_property_descriptor, 2, attr);
define_native_function("getPrototypeOf", get_prototype_of, 1, attr);
define_native_function("has", has, 2, attr);
define_native_function("isExtensible", is_extensible, 1, attr);
define_native_function("ownKeys", own_keys, 1, attr);
define_native_function("preventExtensions", prevent_extensions, 1, attr);
define_native_function("set", set, 3, attr);
define_native_function("setPrototypeOf", set_prototype_of, 2, attr);
define_native_function(vm.names.apply, apply, 3, attr);
define_native_function(vm.names.construct, construct, 2, attr);
define_native_function(vm.names.defineProperty, define_property, 3, attr);
define_native_function(vm.names.deleteProperty, delete_property, 2, attr);
define_native_function(vm.names.get, get, 2, attr);
define_native_function(vm.names.getOwnPropertyDescriptor, get_own_property_descriptor, 2, attr);
define_native_function(vm.names.getPrototypeOf, get_prototype_of, 1, attr);
define_native_function(vm.names.has, has, 2, attr);
define_native_function(vm.names.isExtensible, is_extensible, 1, attr);
define_native_function(vm.names.ownKeys, own_keys, 1, attr);
define_native_function(vm.names.preventExtensions, prevent_extensions, 1, attr);
define_native_function(vm.names.set, set, 3, attr);
define_native_function(vm.names.setPrototypeOf, set_prototype_of, 2, attr);
}
ReflectObject::~ReflectObject()