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Valentin KleinandClaude Opus 5.5
a15d0e5b8e
With DIMASSOC on, every chained dimension looked up the objects under its definition points by scanning the whole space, and each point adds an entity, so a long `points` list took quadratic time (16,000 points: 2.7 s continue, 10 s baseline). The chain now builds one x-sorted SnapIndex up front. Dimensions are no snap targets, so the index stays valid while the chain adds them, and each lookup is a binary search. The index picks the same snap as find_snap: lowest rank first, then the first object in space order. A call with more than 100,000 points is refused. Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>