The default-format timeline inflated a manifest per row — the fetch condition still said 'a.format != .oneline' from when oneline was the default, so zit#170's medium default made every row read one for two strings the image now carries. 66.5s to 0.37s for the full SQLite timeline, output identical.

Repository.manifest counts its reads (ZIT_MANIFEST_READS=1 reports on exit), and an e2e runs ten listings over two history sizes and requires identical counts — a per-row reader fails by construction, no timing, no constants.

zit#172 check-in: 09fa1a7fb3 user: dmestas tags: trunk