Before: frontier with no gen-hash cache, one spec at a time
An empty cache and T27_SUITE_JOBS=1: every spec's generated code made again, one spec after another, as every walk ran before t27#8741.
recorded 2026-10-11 06:55 UTCreal 19.2 sshown 18.6 s
$ time HOME=$(mktemp -d) T27_SUITE_JOBS=1 tri hot frontier | tail -1
Staged: the prompt and the typing. Real: every byte the commands printed, at the time they printed it. No silence was shortened. Edited: home directory shown as ~, temp directory shown as $TMPDIR.