Improve OptimizedSolver, use pieces as hash key by sugyan · Pull Request #3 · sugyan/pentomino
before: #2
after:
test bench_3x20_optimized ... bench: 200,705 ns/iter (+/- 10,797)
test bench_3x20_optimized_unique ... bench: 198,053 ns/iter (+/- 5,818)
test bench_4x15_opti...
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