Performance

4 measured workloads · Node.js · Apple M4 Pro

Typical processing

15.63 µs

Busier blocks

20.63 µs

Share of the test budget

1.5%

8192-frame IR · 128 partition · buffered · 96 kHz · 1.333 ms available per block in this test.

Processing cost

Processing time in µs · lower means less work

Select a point to inspect its measurements. Hollow points indicate variable timing. Lines guide the eye; only marked cases were measured.

Timing varied between repeated tests. Treat this case as a guide.

Retained DSP buffers
402.5 KiB
Impulse first arrival
1.33 ms
Peak output
-30.33 dBFS

Measured tone gain

Gain · dB

Nine separate 0.2-peak sine renders; left-channel RMS gain during 250–500 ms. Includes modulation/envelope behavior; not an LTI error or phase-response measurement.
Measurement details
Retained DSP buffers · 402.5 KiB
Unique backing-buffer capacity reachable from prepared DSP state, including borrowed rings and retained scratch. Excludes JS objects, scalar fields, harness buffers and transient allocation; zero does not mean zero total memory.
Peak output · -30.33 dBFS
Last 4096 frames of a 0.5 s steady render. Effects receive a 0.2-peak 1 kHz sine; sources generate their declared waveform. No automatic musical-quality verdict.
DC offset · 0.00012
Signed mean over the same steady-render channels and final 4096 frames.
Output RMS · -33.33 dBFS
RMS over all channels of the same steady-render window.
Impulse first arrival · 1.33 ms
First channel sample at or above -120 dBFS after a 0.2 impulse, following 250 ms + 127 frames of silence; 2 s observation. Includes configured delay, phase and any dry path. Not device latency or group delay. No detection is unavailable, not zero.
Gain at 1 kHz · -16.34 dB
Left-channel RMS gain from the measured tone-gain sweep.
All measured cases
Sample rate · kHzWorkloadTypical · µsBusier blocks · µsTest budget usedObservations
4815.6720.420.8%Timing varies
4815.7121.250.8%Timing varies
9615.7520.381.5%Timing varies
9615.6320.631.5%Timing varies

Times are per 128-frame audio block. Test budget used divides the p95 time by the block period at that case’s sample rate. Machine and runtime are shared.

Test setup

Node.js · Apple M4 Pro · 48 / 96 kHz · 128 frames per block · 3 repeated tests ·

Typical summarizes the middle measured block times. Busier blocks summarizes the time that 95% of blocks completed within in each repeat. These figures measure DSP processing; application scheduling, loading samples and device output require separate checks. Memory and signal probes run separately from the timing loop.

Lean 4 proofs

No proofs published

No Lean 4 proof is mapped to this node.