masaori335 commented on PR #9394:
URL: https://github.com/apache/trafficserver/pull/9394#issuecomment-1439523746
Microbenchmark with DenseThreadId is below. We can go with it because it has
no collision and we can reduce the slot size.
## read: 1000, write: 0
|ts::bravo::shared_mutex (DenseThreadId)
-- |--
1 |1.02784
2 |1.04234
4 |1.06245
8 |1.14418
16 |1.33218
32 |2.40103
64 |3.26439
## read: 1000, write: 1
|ts::bravo::shared_mutex (DenseThreadId)
-- |--
1 |1.25493
2 |47.5607
4 |85.9465
8 |130.392
16 |106.654
32 |237.198
64 |1259.23
<img width="1095" alt="Screenshot 2023-02-22 at 15 47 28"
src="https://user-images.githubusercontent.com/741391/220544166-c90411ba-1079-4517-905c-3298e969d429.png";>
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