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LibJS/Bytecode: Avoid Value==Value in Call built-in fast path

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Comparing two Values has to call the generic same_value() helper,
and we can avoid this by simply using a stronger type for built-in
native function handlers.
This commit is contained in:
Andreas Kling 2024-02-20 21:29:58 +01:00
parent 1060c63bd8
commit 01e9eee7dd
Notes: sideshowbarker 2024-07-17 11:34:34 +09:00
2 changed files with 8 additions and 5 deletions
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5
Userland/Libraries/LibJS/Bytecode/Interpreter.cpp
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@ -1248,7 +1248,10 @@ ThrowCompletionOr<void> Call::execute_impl(Bytecode::Interpreter& interpreter) c
TRY(throw_if_needed_for_call(interpreter, callee, call_type(), expression_string())); TRY(throw_if_needed_for_call(interpreter, callee, call_type(), expression_string()));
if (m_builtin.has_value() && m_argument_count == Bytecode::builtin_argument_count(m_builtin.value()) && interpreter.realm().get_builtin_value(m_builtin.value()) == callee) { if (m_builtin.has_value()
&& m_argument_count == Bytecode::builtin_argument_count(m_builtin.value())
&& callee.is_object()
&& interpreter.realm().get_builtin_value(m_builtin.value()) == &callee.as_object()) {
interpreter.set(dst(), TRY(dispatch_builtin_call(interpreter, m_builtin.value(), { m_arguments, m_argument_count }))); interpreter.set(dst(), TRY(dispatch_builtin_call(interpreter, m_builtin.value(), { m_arguments, m_argument_count })));
return {}; return {};
} }

8
Userland/Libraries/LibJS/Runtime/Realm.h
View file

@ -52,14 +52,14 @@ public:
HostDefined* host_defined() { return m_host_defined; } HostDefined* host_defined() { return m_host_defined; }
void set_host_defined(OwnPtr<HostDefined> host_defined) { m_host_defined = move(host_defined); } void set_host_defined(OwnPtr<HostDefined> host_defined) { m_host_defined = move(host_defined); }
void define_builtin(Bytecode::Builtin builtin, Value value) void define_builtin(Bytecode::Builtin builtin, NonnullGCPtr<NativeFunction> value)
{ {
m_builtins[to_underlying(builtin)] = value; m_builtins[to_underlying(builtin)] = value;
} }
Value get_builtin_value(Bytecode::Builtin builtin) NonnullGCPtr<NativeFunction> get_builtin_value(Bytecode::Builtin builtin)
{ {
return m_builtins[to_underlying(builtin)]; return *m_builtins[to_underlying(builtin)];
} }
static FlatPtr global_environment_offset() { return OFFSET_OF(Realm, m_global_environment); } static FlatPtr global_environment_offset() { return OFFSET_OF(Realm, m_global_environment); }
@ -74,7 +74,7 @@ private:
GCPtr<Object> m_global_object; // [[GlobalObject]] GCPtr<Object> m_global_object; // [[GlobalObject]]
GCPtr<GlobalEnvironment> m_global_environment; // [[GlobalEnv]] GCPtr<GlobalEnvironment> m_global_environment; // [[GlobalEnv]]
OwnPtr<HostDefined> m_host_defined; // [[HostDefined]] OwnPtr<HostDefined> m_host_defined; // [[HostDefined]]
AK::Array<Value, to_underlying(Bytecode::Builtin::__Count)> m_builtins; AK::Array<GCPtr<NativeFunction>, to_underlying(Bytecode::Builtin::__Count)> m_builtins;
}; };
} }