Generate and solve wordsearches
running 5 tests
test tests::bench_solve_grid_naive ... bench: 2,346,800 ns/iter (+/- 305,054)
test tests::bench_solve_grid_naive_hash_first_letter ... bench: 1,171,656 ns/iter (+/- 277,578)
test tests::bench_solve_grid_reverse ... bench: 1,303,564 ns/iter (+/- 184,705)
test tests::bench_solve_grid_reverse_hash_first_letter ... bench: 933,068 ns/iter (+/- 228,583)
test tests::bench_solve_grid_reverse_hash_first_two_letters ... bench: 1,342,177 ns/iter (+/- 319,067)
test result: ok. 0 passed; 0 failed; 0 ignored; 5 measured; 0 filtered out