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leoBench replays scripted input through the real application, paced by compositor frame callbacks like the main loop, and reports per scenario input latency, frame wall/CPU time, the process/draw split, GPU time of the canvas pass and the window frame, every profiled stage (dabs, stamping, compositing, mips, uploads, stabilizer, history) and counters. The brush and eraser matrix covers brush sizes, zoom levels, every painting preset, texture/spacing/softness, stabilizer amounts, the eraser at several sizes and zoom, and eraser mode. Inputs are a deterministic fast pen scribble plus any recordings made with LEO_RECORD_INPUT, which leoApp now honours. Each scenario is repeated (default 5) so every key metric has a sample per side. Comparisons report medians with spread, the Mann-Whitney U p-value, a Benjamini-Hochberg q over the run, a faster/slower/noise verdict and per-group geometric-mean ratios, in report.md and results.tsv. tools/leo-bench.sh builds Release, runs headless, keeps history per revision and compares with the previous one; leoBenchSmoke runs a short case under ctest.
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