Speed up connection setup, events, data channels and video, fix data channel stalls and connections kept alive after close

[MarshalX]

• Speed up connection setup by keeping libsrtp initialized
• Speed up connection setup by keeping the network list updated
• Add ICE candidates in one signaling task
• Gather a candidate pool without libwebrtc's step delay
• Cache session descriptions between the events that change them
• Speed up event delivery
• Skip wake-ups while the event loop drains
• Send data channel messages in one network-thread task
• Skip the local address lookup on every UDP packet
• Fix data channel stalls under load with larger UDP receive buffers
• Convert received data channel messages once
• Copy video frame data once into pooled buffers
• Convert VideoToolbox output to I420 in one pass
• Reject addIceCandidate without a remote description in the same task
• Speed up data channels with a connected socket for the busy peer
• Add the PythonWebRTC-ConnectedSockets field trial to turn connected sockets off
• Speed up the first connection by running libsrtp's self-tests on their own thread
• Start the network manager without waiting on the network thread
• Create port allocators without a network-thread round trip
• Deliver received data channel messages with less Python per message

[read-the-docs-community]

Documentation build overview

📚 wrtc | 🛠️ Build #35212029 | 📁 Comparing 49b650c against latest (606f9b1)

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5 files changed · + 1 added · ± 4 modified

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• search/index.html

± Modified

• index.html
• benchmarks/index.html
• guides/aiortc/index.html
• guides/field-trials/index.html