branch.list grouped every check-in in the repository on every request: ~150ms in sqlite on tcl, 460-850ms through the driver, on a page whose budget is 500ms. A LIMIT could not help — the grouping happens before the limit applies. Same remedy as the ticket table: fold once when the shape changes, read by index. Refreshed in both fold paths, which the parity test insisted on. check-in: d6bf4e65b3 user: quarry tags: trunk