Signal 01
CPU load / Wasm slowdown
1× is the calibrated baseline · higher means less CPU available to this page
slowdown baseline
Collecting samples
60 seconds agonow
Open sender ↗
WASM
WORKER
ISOLATED
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Stop visuals, spectrum analysis, local test load, and channel searches. The load probe keeps measuring. Display choices are saved in this browser.
Relative CPU availability / live probe
Is the host busy,
or was it our frame?
A fixed-work WebAssembly loop runs off the main thread. Its slowdown is compared with frame timing to make slow-frame attribution less speculative.
Current CPU pressure
—
Warming up
Preparing and calibrating the Wasm loop…
Probe duration
— baseline —Calibration jitter
— collecting signalProbe duty
— effective rate — timer resolution —Signal 02
Frame delays
Only slow frames · height is time over one refresh interval
No slow frames in the last 60 seconds
0 slow frames this session
0 with CPU pressure
Load periodicity
Frequency spectrum
Raw load samples · strongest component = 0 dB · updates once a second
Collecting samples…
Peaks suggest repeating load; they do not identify its source. The analyzer itself adds periodic work, so compare with quiet measurements before attributing a peak. Faster sampling extends the frequency range but costs more CPU. Frequencies above the displayed sampling limit can alias into lower peaks. Longer windows help separate nearby frequencies.
For example, alternating 0101 at 1 bit/s repeats every 2 seconds: look for 0.5 Hz, with possible harmonics. Frame timing and the Smooth 5 setting do not enter this analysis.
Probe setup
Sampling controls
Longer work improves precision but consumes more CPU. Recalibration intentionally burns one core for about a second.
Validation lab
Try to fool the probe
Block only the main thread
Frames should stall. The worker probe should stay close to 1×.
Saturate logical CPUs
Busy workers compete with both rendering and the probe.
Attribution log
Recent slow frames
- No slow frames observed yet.
Remote channel test
Find the fastest reliable symbol rate
Each decision is the integrated excess area under this receiver’s Wasm-slowdown curve. Frame delays are neither collected during the search nor used in its result.
Advanced decision settings
Fastest reliable observation
—Connect both browsers with the same pair code. The search pauses all visual analysis while measuring and restores it afterward. For a visual check, open the sender ↗ and send a pattern at a fixed rate.
BER is the fraction of known 0/1 states decoded incorrectly. Δarea is the difference between integrated load and idle Wasm slowdown; a value near zero means there was no usable carrier.
- No trials run yet.