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    "Same composed scene per view; own coverage implementation patched only for development comparison.",
    "Serial, alternating order; no concurrent profiling, Tk, frame cache or geometry simplification.",
    "Timings exclude composition, hashing, encoding and I/O. Python/font caches warm across calls.",
    "Small local sample, not a statistical guarantee or visible/physical input latency measurement.",
    "API mesh quality/provenance described separately; source data is not redistributed."
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}