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LibJS: Allocate ExecutionContext memory using alloca() when possible

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This should be faster than heap allocation. However, heap allocation is
still necessary in some cases, such as with generators and async
functions.
This commit is contained in:
Aliaksandr Kalenik 2025-04-23 23:44:24 +02:00 • committed by Andreas Kling
parent 5a92929282
commit a329868c1b
Notes: github-actions[bot] 2025-04-24 08:32:11 +00:00
10 changed files with 42 additions and 12 deletions
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3
Libraries/LibJS/Runtime/AbstractOperations.cpp
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@ -662,7 +662,8 @@ ThrowCompletionOr<Value> perform_eval(VM& vm, Value x, CallerMode strict_caller,
executable->dump();
// 20. Let evalContext be a new ECMAScript code execution context.
auto eval_context = ExecutionContext::create(executable->number_of_registers + executable->constants.size() + executable->local_variable_names.size(), 0);
ExecutionContext* eval_context = nullptr;
ALLOCATE_EXECUTION_CONTEXT_ON_NATIVE_STACK(eval_context, executable->number_of_registers + executable->constants.size() + executable->local_variable_names.size(), 0);
// 21. Set evalContext's Function to null.
// NOTE: This was done in the construction of eval_context.