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LibJS: Access function arguments directly in AST interpreter

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Instead of doing a generic scoped variable lookup, function arguments
now go directly to the call frame arguments list.

This is a huge speedup on everything that uses arguments. :^)
This commit is contained in:
Andreas Kling 2021-06-14 09:35:04 +02:00
parent a733a30373
commit 848944113c
1 changed files with 3 additions and 0 deletions
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3
Userland/Libraries/LibJS/AST.cpp
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@ -1301,6 +1301,9 @@ Value Identifier::execute(Interpreter& interpreter, GlobalObject& global_object)
{ {
InterpreterNodeScope node_scope { interpreter, *this }; InterpreterNodeScope node_scope { interpreter, *this };
if (m_argument_index.has_value())
return interpreter.vm().argument(m_argument_index.value());
auto value = interpreter.vm().get_variable(string(), global_object); auto value = interpreter.vm().get_variable(string(), global_object);
if (value.is_empty()) { if (value.is_empty()) {
if (!interpreter.exception()) if (!interpreter.exception())