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NOTES.MD

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Notes

Perf checklist

  • Changed Board representation from list of lists of cells to a flat 16-element unboxed vector
  • Specializing transpose from Unbox a => VUM.MVector s a -> ST s () to VUM.MVector s Cell -> ST s () gave us a big perf improvement
  • Swapping (,) for Data.Strict.Tuple.Pair in Eval.monotonicity shaved off 15~20%
  • Swapping (,) for Data.Strict.Tuple.Pair in StateTree shaved off 5~10%

Things that were measured but did not speed up execution

  • Specializing sliceRowsM and findIndex
  • Using Vector.Mutable.Unboxed.unsafeWrite, unsafeRead, unsafeSlice, unsafeSwap
  • Swapping Data.Maybe for Data.Strict.Maybe
  • -fspecialise-aggressively