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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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13
Libraries/LibJS/Runtime/DateConstructor.cpp
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@ -138,19 +138,20 @@ static Value parse_simplified_iso8601(const String& iso_8601)
}
DateConstructor::DateConstructor(GlobalObject& global_object)
: NativeFunction("Date", *global_object.function_prototype())
: NativeFunction(vm().names.Date, *global_object.function_prototype())
{
}
void DateConstructor::initialize(GlobalObject& global_object)
{
auto& vm = this->vm();
NativeFunction::initialize(global_object);
define_property("prototype", global_object.date_prototype(), 0);
define_property("length", Value(7), Attribute::Configurable);
define_property(vm.names.prototype, global_object.date_prototype(), 0);
define_property(vm.names.length, Value(7), Attribute::Configurable);
define_native_function("now", now, 0, Attribute::Writable | Attribute::Configurable);
define_native_function("parse", parse, 1, Attribute::Writable | Attribute::Configurable);
define_native_function("UTC", utc, 1, Attribute::Writable | Attribute::Configurable);
define_native_function(vm.names.now, now, 0, Attribute::Writable | Attribute::Configurable);
define_native_function(vm.names.parse, parse, 1, Attribute::Writable | Attribute::Configurable);
define_native_function(vm.names.UTC, utc, 1, Attribute::Writable | Attribute::Configurable);
}
DateConstructor::~DateConstructor()