Files
nvfp4-megamoe-kernel/cutedsl
biondizzle 84a2f6d441 perf: replace expert counting O(n*E) comparison with torch.bincount O(n)
Bug #5 fix: (sorted_ids.unsqueeze(1) == expert_id_range.unsqueeze(0)).sum(dim=0)
materializes a (num_slots × num_experts) bool tensor every forward — 48K × 384 = 18M
elements. torch.bincount(sorted_ids, minlength=num_experts) gives the same result
in O(n) with no intermediate allocation. ~200× less work.

Also removes the now-unused _expert_id_range buffer.
2026-05-20 02:17:23 +00:00
..