Performance

4 measured workloads · Node.js · Apple M4 Pro

Typical processing

0.122 ms

Busier blocks

0.128 ms

Share of the test budget

9.6%

5 s spring · dispersion 0.8 · 96 kHz · 1.333 ms available per block in this test.

Processing cost

Processing time in ms · 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
754.0 KiB
Impulse first arrival
17.72 ms
Peak output
-18.75 dBFS

Captured energy decay

Remaining energy · dB

Stereo-summed backward squared-energy integration, sampled every 20 ms, normalized to the captured 2 s impulse response. Finite-window curve; no extrapolated RT60 claim.
Measurement details
Retained DSP buffers · 754.0 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 · -18.75 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 · 0.00047
Signed mean over the same steady-render channels and final 4096 frames.
Output RMS · -25.65 dBFS
RMS over all channels of the same steady-render window.
Impulse first arrival · 17.72 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.
Energy after 1 second · -10.96 dB
Energy in the second second relative to the captured 2 s response. A long decay may extend beyond the capture.
All measured cases
Sample rate · kHzWorkloadTypical · msBusier blocks · msTest budget usedObservations
480.0800.0843.2%—
480.0800.0863.2%—
960.1190.1289.6%—
960.1220.1289.6%—

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.