savonet/liquidsoap v2.4.5

Liquidsoap 2.4.5

on GitHub

This is a maintenance release in the 2.4.x series, bringing a handful of bug fixes, a couple of small new features, and, most
importantly, a focused round of performance work that cuts CPU usage by 10-25% across the board on real workloads.

See our blog post for more details about the optimizations in this release.

We recommend that anyone running any 2.4.x release upgrades to 2.4.5 when possible. As always, please test in a staging environment before deploying to production.

Full changelog

New:

• Added remove and remove_request_id methods to request.queue to remove
  a specific request from the queue, also available as a telnet remove command (#5237)
• Improved error messages in playlist parsers to include more context about the
  source of the error
• Added audio/aiff, audio/x-aiff and audio/x-wavpack entries to
  the default settings.http.mime.extnames table so protocol.http resolves
  AIFF and WavPack URLs to their real extensions instead of the .osb
  fallback.

Fixed:

• Fixed crash when external input (input.process, input.ffmpeg, etc.) encounters an EOF (thanks to @MikaSappi, #5139)
• Fixed harbor.remove_http_handler discarding all registered handlers except the one being removed
• Fixed crash in crossfade/cross when source.skip is called from outside the clock thread, e.g. from a harbor.http handler or thread.run (#5194)
• Fixed memory leak in Strings.Mutable (#5231)

Optimized:

• Clock sync-source propagation is now push-based and O(1) per tick instead of scanning all sources (#5133)
• Stream format/kind dispatch now uses O(1) int-indexed array lookup instead of iterating a queue (#5136)
• Optimized content_length and timed blit hot paths (#5137)
• Chunk total length is now cached in the chunks record to avoid recomputation (#5140)
• Chunk length is now pre-computed on lift (#5135)
• Watcher before/after cycle callbacks are only registered when watchers are actually present
• WeakQueue now uses geometric doubling and a RW-lock for faster concurrent access (#5118)
• Use direct Int comparison functions in stream hot paths