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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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6
Userland/test-js.cpp
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@ -154,8 +154,10 @@ TestRunnerGlobalObject::~TestRunnerGlobalObject()
void TestRunnerGlobalObject::initialize()
{
JS::GlobalObject::initialize();
define_property("global", this, JS::Attribute::Enumerable);
define_native_function("isStrictMode", is_strict_mode);
static FlyString global_property_name { "global" };
static FlyString is_strict_mode_property_name { "isStrictMode" };
define_property(global_property_name, this, JS::Attribute::Enumerable);
define_native_function(is_strict_mode_property_name, is_strict_mode);
}
JS_DEFINE_NATIVE_FUNCTION(TestRunnerGlobalObject::is_strict_mode)