Performance

2 measured workloads · Node.js · Apple M4 Pro

Typical processing

4.92 µs

Busier blocks

5.13 µs

Share of the test budget

0.2%

Lowpass side · control 0.3 · 48 kHz · 2.667 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.
Retained DSP buffers
0 bytes
Impulse first arrival
0.00 ms
Peak output
-14.82 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 · 0 bytes
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 · -14.82 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 · -0.00048
Signed mean over the same steady-render channels and final 4096 frames.
Output RMS · -19.10 dBFS
RMS over all channels of the same steady-render window.
Impulse first arrival · 0.00 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 · -0.89 dB
Left-channel RMS gain from the measured tone-gain sweep.
All measured cases
Sample rate · kHzWorkloadTypical · µsBusier blocks · µsTest budget usedObservations
485.005.210.2%—
484.925.130.2%—

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 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.