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On my machine, this script took about 3.4 seconds, and was responsible
for essentially all of the time taken by the precommit hook.
The script is a faithful 1:1 reimplementation, even the regexes are
identical. And yet, it takes about 0.02 seconds, making the pre-commit
hook lightning fast again. Apparently python is just faster in this
case.
Fun fact:
- Just reading all ~4000 files took bash about 1.2 seconds
- Checking the license took another 1.8 seconds in total
- Checking for math.h took another 0.4 seconds in total
- Checking for '#pragma once' took another 0.4 seconds in total
The timing is highly load-dependent, so they don't exactly add up to 3.4
seconds. However, it's good enough to determine that bash is no longer
fit for the purpose of this script.
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