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node-api: use container swap in DrainFinalizerQueue to reduce erase overhead #57861

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node-api: use container swap in DrainFinalizerQueue to reduce erase overhead #57861

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node-api: per-item finalizer queue drain for nested napi_ref deletion
mertcanaltin May 6, 2025
4fe09e9
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mertcanaltin May 7, 2025
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9 changes: 5 additions & 4 deletions src/node_api.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -114,11 +114,12 @@ void node_napi_env__::EnqueueFinalizer(v8impl::RefTracker* finalizer) {

void node_napi_env__::DrainFinalizerQueue() {
// As userland code can delete additional references in one finalizer,
// the list of pending finalizers may be mutated as we execute them, so
// we keep iterating it until it is empty.
// the list of pending finalizers may be mutated as we execute them
// (items may be added or removed), so keep iterating until it is empty.
while (!pending_finalizers.empty()) {
v8impl::RefTracker* ref_tracker = *pending_finalizers.begin();
pending_finalizers.erase(ref_tracker);
auto it = pending_finalizers.begin();
v8impl::RefTracker* ref_tracker = *it;
pending_finalizers.erase(it);
ref_tracker->Finalize();
}
}
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