Missing performance comparison with re

[mrabarnett]

Original report by Anonymous.

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I got to this project trying to find a re alternative, because for some cases it was running slow.

While reading the documentation I failed to find a performance comparison between re and regex libraries. It would be amazing to have this!

[mrabarnett]

Original comment by Matthew Barnett (Bitbucket: mrabarnett, GitHub: mrabarnett).

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The performance difference depends on what you're doing, so it's not clear how useful it would be in practice.

[mrabarnett]

Original comment by Andres Riancho (Bitbucket: andresriancho, GitHub: andresriancho).

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Well... yes... and no...

A good performance comparison between two libraries would cover 80-90% of the most common use cases of the libraries (in this case it would be different regular expressions, search, match, replace, etc.) and see how both libraries perform.

Examples:
https://rust-leipzig.github.io/regex/2017/03/28/comparison-of-regex-engines/
https://01.org/hyperscan/blogs/jpviiret/2017/performance-analysis-hyperscan-hsbench