ZD621 profile · median of ten rounds. Native scene/raster/total stages exclude PNG encoding. Go and Node PNG workloads include the public package bindings and encoding, with engine reuse and separate initialization measurements. Canvases are 812 × 600 dots; dense uses 400 × 300.
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Each line keeps its exact compiler, harness, and machine environment. Historical runs are observational; PR comparisons alternate base and head on the same worker. Small differences may be noise.
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