79 models / 693 selected images, --repeats 2, against a clean worktree of
the tested commit. Every run probed a warm edge and the new-tree modes
produced identical files and bytes.
- serial -> new-serial: 4.6x less wall time with 3.1x fewer bytes.
- pipeline vs new-serial: -32.1% (1.47x).
- aimd vs pipeline: -17.3%; aimd vs new-serial: -43.9% (1.78x), 6 -> 8
probing, no 429s.
The two subsets agree closely (pipeline 1.47-1.49x, AIMD 1.77-1.78x),
which confirms the gains are not a small-subset artifact.
Refs #1203
Will Miao
32b5ec28cd