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src: optimize trace_name allocation in Worker::Run #60886

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src: optimize trace_name allocation in Worker::Run #60886

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0c80bc1
src: optimize trace_name allocation in Worker::Run
mertcanaltin Nov 28, 2025
8ea8692
src: optimize trace_name allocation in Worker::Run
mertcanaltin Nov 29, 2025
1b54dd6
src: optimize trace_name allocation in Worker::Run
mertcanaltin Nov 29, 2025
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13 changes: 11 additions & 2 deletions src/node_worker.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -295,8 +295,17 @@ size_t Worker::NearHeapLimit(void* data, size_t current_heap_limit,
}

void Worker::Run() {
std::string trace_name = "[worker " + std::to_string(thread_id_.id) + "]" +
(name_ == "" ? "" : " " + name_);
std::string trace_name;
// Pre-allocate space: "[worker " (8) + thread_id (20) + "]" (1) + " " (1)
// + typical name (~30) = ~60 bytes. Use 64 for alignment.
trace_name.reserve(64);
trace_name = "[worker ";
trace_name += std::to_string(thread_id_.id);
trace_name += "]";
if (!name_.empty()) {
trace_name += " ";
trace_name += name_;
}
TRACE_EVENT_METADATA1(
"__metadata", "thread_name", "name", TRACE_STR_COPY(trace_name.c_str()));
CHECK_NOT_NULL(platform_);
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