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Summary
PR migrates to the new
pion/webrtc
v4 and related dependencies.Of note, I conducted a quick load test to ensure performance was on par, and it didn't go as expected (20-30% worse). After some digging, I discovered the issue being on the client side, meaning the updated client is now sending significantly more (one order of magnitude) RTCP messages (twcc especially), which are causing additional load on the server. Disabling that interceptor brings the performance back to the expected level.
What this means is that the server performs equally (less than 5% variance) when load-tested by a non-updated client. I'll need to review this separately because I don't yet know how this new client behaviour compares to a real client (e.g. web browser) (https://mattermost.atlassian.net/browse/MM-61476) but the backend update can proceed.
Ticket Link
https://mattermost.atlassian.net/browse/MM-61426