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Raja SubramanianandClaude Fable 5.1
9b20c1da57
* sfu/buffer: stop allocating per ingested packet Buffer.Write allocated six objects for every RTP packet. They were the parsed rtp.Packet, a copy of it in patchExtPacket, and the flow state, whose address two rare log calls took. The rest were an AbsCaptureTime, present on about one packet per second, and the extension slice that pion grows with append. Unmarshal into a pooled scratch packet. Give ExtPacket its own backing rtp.Packet and an [8]rtp.Extension array, and copy the header into them. Patch the payload in place. If the abs-capture-time extension is present, parse it. Log a copy of the flow state. Per packet, Write plus ReadExtended. Opus: 6 allocs, 448 B -> 0. VP8: 6 allocs, 416 B -> 1 alloc, 32 B. Opus 240 -> 142 ns, VP8 269 -> 204 ns. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> * sfu/buffer: point extension payloads at the bucket copy on read Queued ExtPackets kept extension payload slices into the write input, which the transport reuses for the next packet. ReadExtended now parses the header again from the bucket copy, so extensions and CSRCs point into RawPacket like the payload does. The test writes every packet through one input buffer and checks the audio level of each packet read back. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> * sfu/buffer: test that a dropped padding packet keeps the shifted sequence number on read The bucket stores the shifted number, so re-parsing the header on read returns it. This test guards that. Co-Authored-By: Claude Fable 5.1 <noreply@anthropic.com> --------- Co-authored-by: Claude Fable 5.1 <noreply@anthropic.com>