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refactor: omit redundant map searches (#19929)

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* refactor: don't walk maps twice to remove elements

* refactor: don't walk maps twice to read elements

* refactor: don't walk maps twice to insert elements

* refactor: don't walk map 3x on UvTaskRunner timeout

* refactor: more don't-walk-maps-twice cleanup

* fixup! refactor: don't walk maps twice to insert elements

* refactor: don't walk containers twice when erasing

* refactor: omit excess lookups in RemoteObjectFreer
This commit is contained in:
Charles Kerr 2019-08-28 09:39:21 -05:00 • committed by GitHub
parent 27ce6a9cd3
commit 987300c97a
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GPG key ID: 4AEE18F83AFDEB23
14 changed files with 88 additions and 86 deletions
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23
shell/common/api/remote_object_freer.cc
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@ -65,16 +65,27 @@ void RemoteObjectFreer::RunDestructor() {
if (!render_frame)
return;
// Reset our local ref count in case we are in a GC race condition
// and will get more references in an inbound IPC message
int ref_count = 0;
const auto objects_it = ref_mapper_.find(context_id_);
if (objects_it != std::end(ref_mapper_)) {
auto& objects = objects_it->second;
const auto ref_it = objects.find(object_id_);
if (ref_it != std::end(objects)) {
ref_count = ref_it->second;
objects.erase(ref_it);
}
if (objects.empty())
ref_mapper_.erase(objects_it);
}
auto* channel = "ELECTRON_BROWSER_DEREFERENCE";
base::ListValue args;
args.AppendString(context_id_);
args.AppendInteger(object_id_);
args.AppendInteger(ref_mapper_[context_id_][object_id_]);
// Reset our local ref count in case we are in a GC race condition and will
// get more references in an inbound IPC message
ref_mapper_[context_id_].erase(object_id_);
if (ref_mapper_[context_id_].empty())
ref_mapper_.erase(context_id_);
args.AppendInteger(ref_count);
mojom::ElectronBrowserAssociatedPtr electron_ptr;
render_frame->GetRemoteAssociatedInterfaces()->GetInterface(