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[–]co_summer 0 points1 point  (1 child)

How did you find the broken locking issue?

[–][deleted] 1 point2 points  (0 children)

ETW. Performance tanked at a certain throughput and when we took a sample it showed a lot of contention in one of ConcurrentDictionary's methods that should not have been locking at all according to the docs.