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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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11
Libraries/LibJS/Runtime/BigIntConstructor.cpp
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@ -35,19 +35,20 @@
namespace JS {
BigIntConstructor::BigIntConstructor(GlobalObject& global_object)
: NativeFunction("BigInt", *global_object.function_prototype())
: NativeFunction(vm().names.BigInt, *global_object.function_prototype())
{
}
void BigIntConstructor::initialize(GlobalObject& global_object)
{
auto& vm = this->vm();
NativeFunction::initialize(global_object);
define_property("prototype", global_object.bigint_prototype(), 0);
define_property("length", Value(1), Attribute::Configurable);
define_property(vm.names.prototype, global_object.bigint_prototype(), 0);
define_property(vm.names.length, Value(1), Attribute::Configurable);
u8 attr = Attribute::Writable | Attribute::Configurable;
define_native_function("asIntN", as_int_n, 2, attr);
define_native_function("asUintN", as_uint_n, 2, attr);
define_native_function(vm.names.asIntN, as_int_n, 2, attr);
define_native_function(vm.names.asUintN, as_uint_n, 2, attr);
}
BigIntConstructor::~BigIntConstructor()