PSA: regex! is now slower than Regex::new

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It was requested that I post this here. :slight_smile: See the reddit thread for details. If you dig into the comments, there are some words about the new optimizations!

See: http://www.reddit.com/r/rust/comments/3b2i0f/psa_regex_is_now_slower_than_regexnew/

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I know you really mean: Regex::new is awesomely much faster, surpassing regex!().

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I hope so, I'm still figuring out whether this means regex! has gotten slower, or regex::new() has gotten faster :smiley:

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It's unfortunately both. regex! lost the naive literal prefix optimization and never gain the more sophisticated one that is now in Regex::new. See: do simple literal prefix scanning in regex! · Issue #95 · rust-lang/regex · GitHub

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