Measured with Stryker once Solve was actually mutated (21 survivors), most of
them were code that decided nothing:
- The finite-input loops over A and b duplicated the non-finite test on the
accumulated A^T b, which is exactly equivalent (floats cannot overflow a
double product, and NaN/infinity never cancel to a finite value). One check
on each A^T b entry remains.
- The tolerance scale is the gradient at the box point nearest the origin,
computed inline; the max with |A^T b| duplicated it whenever the origin is in
the box, and the scratch vector for it is gone.
- Bound violation is state * gradient, which is zero for a free column; the
three-way ternary duplicated the free-stationarity check.
- The warm-start clamp is Math.Clamp plus a NaN test.
- Workspace slices come off a cursor (Take) instead of hand-summed offsets.
Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
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