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When the haystack string contained a non-single-byte character, code would previously call `StringSupport.nth` for every backwards step. `nth` walks all the way through the string from the beginning. The combination of these caused O(n^2) behavior. Now `rindex` follows MRI's pattern of simply walking backward until we find the previous character. Fixes jruby#1140
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Could you provide a benchmark, please? |
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Oh, I see #1140 (comment) |
enebo
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Oct 27, 2013
`rindex` performance improvement
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Thanks! ❤️ 💚 💙 |
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