Matt Joras 431acc838f Optimize ACK frame writing ...

Summary:
Previously we stored an `IntervalSet` in each `WriteAckFrame`. We don't need to do this, as by the time we are writing an `ACK` the `IntervalSet` is complete. Instead of bothering with the `IntervalSet` operations, we can simply serialize it to a reverse-sorted `vector.`

Additionally this has some micro-optimizations for filling the ACK frame, with a new function for getting varint size.

Reviewed By: yangchi

Differential Revision: D19397728

fbshipit-source-id: ba6958fb36a4681edaa8394b1bcbbec3472e177d

2020-01-16 10:40:40 -08:00

36 KiB

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