The candidate validator flattened every arc into 1000 segments and rebuilt
both parts' polygons and edge lists for every pair it compared, so spacing
checks on filleted parts cost millions of edge pairs each. Validation, not
the fill pipeline, was nearly all of a solve's wall time.
Placed contours are now flattened once with ToPolygonWithTolerance(0.001),
the tolerance the benchmark NestValidator and Part.Intersects already use,
and each part's shape is built once per candidate. Arcs stay inscribed, so
a layout placed exactly at the spacing still passes.
12-nest PEP corpus, Default + StockLadder, --parallel 1: 2820 s -> 227 s.
Every run that finished before gives the same validity, count, plates and
cost. Three StockLadder runs that used to hit the 5-minute timeout now
finish.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
ajandClaude Opus 5.5
dc9e83ef17