Changes results - not for merging without the owner's approval.
The per-image min-pix scheme indexed every frame at min-pix 3, 2 and 1, each with the 30/80/all seed
escalation, then indexed the winner again: 3.9 indexer calls per frame. Measured per frame on a
serial lysozyme run (2000 frames, de novo and against the known cell):
- where several lists index, the searches return the same lattice (97-98% of pairs);
- the gain over a fixed min-pix 2 has two sources: (A) frames min-pix 2 indexes but whose min-pix
1/3 list indexes ~26 more spots (a better per-frame refinement), and (B) frames with almost no
spot of two pixels (min-pix 3/2 lists of 1-3 spots, ~50 single pixels at min-pix 1) on which the
min-pix 1 search fits 8-9 spots. De novo, 189 of 194 such B lattices had cells unrelated to the
crystal's; against the known cell they index, but leaving them out raises I/sigma and lowers R_pim.
Now: the lattice is searched for on the min-pix 2 list (min-pix 3 where that does not index); the
first list that indexes hands its indexer answer to the others, which are only refined and scored
(FrameIndexerCalls::lattice_found). The min-pix 1 list is searched on its own only where the min-pix
2 list holds at least ViableCellMinSpots spots. Ties keep the larger min-pix, as before.
Measured on two full 24960-frame serial runs (RTX 5080, box loaded by other agents, load 9-20; loop
rate is frames/s of the image loop; I/sig, R_pim, observations of the P41212 merge):
known cell (ffbidx, -C): base 785 / 750 -> 1130 / 1017 frames/s (warm 6000-frame ABAB 860 -> 1453)
run A: obs 5.37M -> 5.30M, I/sig 13.09 -> 13.02, R_pim 6.48 -> 6.46%, CC1/2 .970 -> .973
run B: obs 4.91M -> 4.89M, I/sig 12.00 -> 11.95, R_pim 6.50 -> 6.47%, CC1/2 .971 -> .970
de novo (FFT): base 89 / 91 -> 174 / 195 frames/s
run A: obs 3.96M -> 3.91M, I/sig 10.18 -> 10.12, R_pim 6.94 -> 6.98%, CC1/2 .960 -> .967
run B: obs 3.91M -> 3.89M, I/sig 10.53 -> 10.52, R_pim 7.01 -> 7.03%, CC1/2 .965 -> .961
fixed min-pix 2, for scale: ffbidx 1496 / 1316 frames/s, obs 4.94M / 4.54M, I/sig 12.62 / 11.77.
The indexing rate drops (ffbidx 59.5 -> 56.9%, 55.2 -> 52.4%; FFT 60.5 -> 52.1%, 60.2 -> 47.9%):
the frames that go are the spurious B lattices; observations stay within 1.3%. Indexer calls per
frame 3.89 -> 1.67 (de novo, 2000 frames); the min-pix 1 search is skipped on 58% of frames.
De novo, 23 of 691 frames whose lattice was the crystal's now take a superlattice (13, same spots
indexed) or a cell fitted to 6-12 spots of a weak frame (10) from the min-pix 2 search.
Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>
leonarski_fandClaude Opus 5.5
804206155b
