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I did run into https://tech.popdata.org/speeding-up-Jaro-Winkler-with-rust-and-bitwise-operations/ today and since I have a similar implementation (here: https://github.com/maxbachmann/rapidfuzz-cpp/blob/main/rapidfuzz/distance/Jaro_impl.hpp) I looked into the way your implementation works.
This PR reduces the bitwise instructions used in the inner loop. Be aware, that I did not test this and do not know a ton about rust, so take this with a grain of salt.
Looking at godbolt this seems to help reduce the used instruction quite significantly:
https://rust.godbolt.org/z/dv79vfjfx
to
https://rust.godbolt.org/z/x4KdvYT36