Defer MetricKey construction to the aggregator thread#11381

dougqh wants to merge 2 commits into

dougqh/conflating-metrics-producer-winsDataDog/dd-trace-java:dougqh/conflating-metrics-producer-winsfrom

dougqh/conflating-metrics-background-workDataDog/dd-trace-java:dougqh/conflating-metrics-background-workCopy head branch name to clipboard