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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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24
Libraries/LibJS/AST.cpp
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@ -698,6 +698,7 @@ Value ClassMethod::execute(Interpreter& interpreter, GlobalObject& global_object
Value ClassExpression::execute(Interpreter& interpreter, GlobalObject& global_object) const
{
auto& vm = interpreter.vm();
Value class_constructor_value = m_constructor->execute(interpreter, global_object);
if (interpreter.exception())
return {};
@ -720,22 +721,22 @@ Value ClassExpression::execute(Interpreter& interpreter, GlobalObject& global_ob
Object* super_constructor_prototype = nullptr;
if (!super_constructor.is_null()) {
super_constructor_prototype = &super_constructor.as_object().get("prototype").as_object();
super_constructor_prototype = &super_constructor.as_object().get(vm.names.prototype).as_object();
if (interpreter.exception())
return {};
}
prototype->set_prototype(super_constructor_prototype);
prototype->define_property("constructor", class_constructor, 0);
prototype->define_property(vm.names.constructor, class_constructor, 0);
if (interpreter.exception())
return {};
class_constructor->define_property("prototype", prototype, 0);
class_constructor->define_property(vm.names.prototype, prototype, 0);
if (interpreter.exception())
return {};
class_constructor->set_prototype(super_constructor.is_null() ? global_object.function_prototype() : &super_constructor.as_object());
}
auto class_prototype = class_constructor->get("prototype");
auto class_prototype = class_constructor->get(vm.names.prototype);
if (interpreter.exception())
return {};
@ -1756,21 +1757,22 @@ void TaggedTemplateLiteral::dump(int indent) const
Value TaggedTemplateLiteral::execute(Interpreter& interpreter, GlobalObject& global_object) const
{
auto& vm = interpreter.vm();
auto tag = m_tag->execute(interpreter, global_object);
if (interpreter.exception())
if (vm.exception())
return {};
if (!tag.is_function()) {
interpreter.vm().throw_exception<TypeError>(global_object, ErrorType::NotAFunction, tag.to_string_without_side_effects());
vm.throw_exception<TypeError>(global_object, ErrorType::NotAFunction, tag.to_string_without_side_effects());
return {};
}
auto& tag_function = tag.as_function();
auto& expressions = m_template_literal->expressions();
auto* strings = Array::create(global_object);
MarkedValueList arguments(interpreter.heap());
MarkedValueList arguments(vm.heap());
arguments.append(strings);
for (size_t i = 0; i < expressions.size(); ++i) {
auto value = expressions[i].execute(interpreter, global_object);
if (interpreter.exception())
if (vm.exception())
return {};
// tag`${foo}` -> "", foo, "" -> tag(["", ""], foo)
// tag`foo${bar}baz${qux}` -> "foo", bar, "baz", qux, "" -> tag(["foo", "baz", ""], bar, qux)
@ -1784,12 +1786,12 @@ Value TaggedTemplateLiteral::execute(Interpreter& interpreter, GlobalObject& glo
auto* raw_strings = Array::create(global_object);
for (auto& raw_string : m_template_literal->raw_strings()) {
auto value = raw_string.execute(interpreter, global_object);
if (interpreter.exception())
if (vm.exception())
return {};
raw_strings->indexed_properties().append(value);
}
strings->define_property("raw", raw_strings, 0);
return interpreter.vm().call(tag_function, js_undefined(), move(arguments));
strings->define_property(vm.names.raw, raw_strings, 0);
return vm.call(tag_function, js_undefined(), move(arguments));
}
void TryStatement::dump(int indent) const