The sweep could not finish inside its own 10-minute step timeout. Per-target cost varies by roughly 276x across the corpus: artifact_parse_garbage runs 100 rounds in 0.18s, while logstore_pack_same_path_round_trip takes 49s because it performs a full store pack every round. At 2000 rounds that single target needs about 16 minutes on its own.

The original figure was extrapolated from one cheap target on the assumption that per-round cost was roughly uniform. It is not, and the assumption was never measured. 100 rounds is measured: the full 27-target sweep takes about 76s.

This makes CI fuzzing a regression check — every target still runs clean on every push — rather than a bug hunt. Finding new defects needs depth, and depth belongs in an out-of-band run with its own budget, where a long sweep costs nobody a merge. check-in: 861b223e3c user: dmestas tags: trunk