Kestrel is a bit locky

Open

#10,148 opened on May 10, 2019 1 comment 3 reactions 0 assignees View on GitHub

affected-very-few area-networking enhancement Perf severity-nice-to-have

Description

Turning off inlining to see the calls to `Monitor.Enter`; for 82,273 requests it takes 1,090,538 locks or ~13 per request:

![image](https://user-images.githubusercontent.com/1142958/57537043-61a65200-733d-11e9-8b46-47c7d89ac3a7.png)

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