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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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6
Libraries/LibJS/Runtime/NativeFunction.cpp
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@ -119,7 +119,8 @@ ThrowCompletionOr<Value> NativeFunction::internal_call(Value this_argument, Read
// 2. If callerContext is not already suspended, suspend callerContext.
// 3. Let calleeContext be a new execution context.
auto callee_context = ExecutionContext::create(0, arguments_list.size());
ExecutionContext* callee_context = nullptr;
ALLOCATE_EXECUTION_CONTEXT_ON_NATIVE_STACK(callee_context, 0, arguments_list.size());
// 4. Set the Function of calleeContext to F.
callee_context->function = this;
@ -181,7 +182,8 @@ ThrowCompletionOr<GC::Ref<Object>> NativeFunction::internal_construct(ReadonlySp
// 2. If callerContext is not already suspended, suspend callerContext.
// 3. Let calleeContext be a new execution context.
auto callee_context = ExecutionContext::create(0, arguments_list.size());
ExecutionContext* callee_context = nullptr;
ALLOCATE_EXECUTION_CONTEXT_ON_NATIVE_STACK(callee_context, 0, arguments_list.size());
// 4. Set the Function of calleeContext to F.
callee_context->function = this;