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I am looking for a gratis web-app or Windows app that shows me the speed of computing a regex on one or more sample strings.

The speed can be actual speed, or a relative speed as compared to a standardized index.

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If you are using python with the re or regex libraries you can simply use the timeit library or even easier in iPython or Jupyter you can use the %time and %timeit magics along with the %prun magic.

All of the software mentioned above is Free, Gratis & Open Source, and available for multiple platforms including Windows.

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