compare

Overview ¶

Command compare benchmarks the pure-Go webengine renderer against real headless Chromium on both fidelity (SSIM + pixel-diff over the common region) and speed (median wall-clock over N runs after a warmup). For each URL it writes a side-by-side montage (webengine | chrome | diff-heatmap) plus a machine-readable results.json and a human-readable REPORT.md table.

It lives in a separate module (github.com/go-webengine/engine/bench) so its Chrome-driving dependency (chromedp) never enters the engine module's CGO=0, 6-arch build or its coverage gate.