traeak commented on code in PR #10942:
URL: https://github.com/apache/trafficserver/pull/10942#discussion_r1430495582
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plugins/experimental/rate_limit/limiter.h:
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@@ -117,12 +117,15 @@ template <class T> class RateLimiter
memset(_metrics, 0, sizeof(_metrics));
std::string metric_prefix = prefix;
Review Comment:
> Should you use the std::string::reserve() member function for these so
there will be only one heap allocation?
This function is "initializeMetrics" which is only called during plugin
initialization. And there's more logic below in the function for building this
metric_prefix string. You might save one heap allocation with a reserve for
something not in a performance sensitive place.
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