NetterSilverandClaude Opus 5.5 d293336eac Speed up the bounce hot paths without changing output ...

Profiling a demo-session bounce showed the time going to per-sample work that
can be done more cheaply while producing bit-identical results:

- mix: the fader ramp converted dB to gain (two powf) for every sample of every
  strip and of the master; GainRamp converts once per block.
- mix: apply_matrix_span has slice fast paths for one and two taps per output,
  summing in the same order as the general loop.
- mix/dsp: strip meters and the bounce peak use an 8-lane max (channel_peak);
  max is order-independent, so the result is unchanged.
- dsp: LoudnessMeter true peak keeps its history in a doubled ring instead of
  shifting it every sample and runs the four phases side by side, each phase
  still summing its taps in the original order.
- dsp: Maximizer finds the window minimum with a monotonic queue instead of
  scanning the whole lookahead window every sample.
- dsp: flush() tests both bounds without short-circuiting; audio-io quantize
  rounds half away from zero without the libm call (exact on its clamped range).

Demo bounce (24-bit dithered WAV, 55.9 s, 3 bounces per run, interleaved,
15 runs each, Ryzen 16 threads, shared machine): median 3.677 s -> 2.955 s
(-19.6 %), min 3.116 s -> 2.394 s (-23.2 %). Output WAV byte-identical, reported
LUFS/true peak/peak identical. New tests pin meter, maximizer, plate reverb and
demo bounce output against values taken from the previous implementation.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

2026-10-27 17:42:09 +01:00

..

examples

Parallel mixer, Setup windows, clip gain lines, folders, mix-strip sections, docs

2026-10-05 23:14:48 -04:00

src

Speed up the bounce hot paths without changing output

2026-10-27 17:42:09 +01:00

tests/it

Integration: build the batch's new integration tests into each crate's tests/it binary

2026-10-24 06:54:11 +00:00

Cargo.toml

Video track, Audio Unit hosting, plugin state and editors, Renderer and UI Customization

2026-10-06 01:41:05 -04:00