In highly loaded media servers, RTCPReceiver's use of std::set
attributes to ~0.87% CPU. It's mostly ::find and the [] operator and the
assignment operator.
* Removed locking of a mutex in `TriggerCallbacksFromRtcpPacket``
as it copied members that were already const.
* Switched the use of std::set for the list of registered local SSRCs
to an absl::InlinedVector, as the set is very small and it's not
expected that any more complicated container would be faster than a
linear search within a cache line.
Bug: webrtc:12689
Change-Id: I734578c22eeca2d9ba89fef77ecc689b72624567
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/216322
Commit-Queue: Victor Boivie <boivie@webrtc.org>
Reviewed-by: Danil Chapovalov <danilchap@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#33849}
306b1393cb