tests/harness/effect-costs.json and effect4-costs.json were recorded on
2026-10-01 and give the fixtures' relative cost for balancedShardSelect
across the 16 Effect shards of each flavor. Against the fixture times of
three green main runs (38851650148, 38851726594, 38852266290), the old
tables put 1,171 s of plain and 1,295 s of sanitized fixture time on the
longest shard, against a mean of 1,027 and 1,111 s.
scripts/ci-effect-costs.mjs refreshes both tables from Effect job logs:
each fixture's plain and sanitized medians, summed in seconds, as the
tables recorded before. Fixtures without a measurement keep their value,
and fixtures that no longer exist are removed. With the refreshed tables,
the longest shard of the same measurements carries 1,082 s (plain) and
1,144 s (sanitized).
