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gh-107369: Optimise textwrap.indent() #131923

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merged 1 commit into from
Mar 31, 2025
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@AA-Turner AA-Turner commented Mar 31, 2025

Follow-up to #131919, I noticed there was opportunity for improvement here too, a ~30% speed-up.

Benchmark textwrap new
indent 3.59 ms 2.81 ms: 1.28x faster

Benchmarked by indenting the contents of Objects/unicodeobject.c.

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This is funny because this was my very first attempt at CPython: https://github.com/python/cpython/pull/107426/files :') It was rejected at that time (#107426 (comment)) though

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Oh, I didn't see that PR! I think the optimisation is worth it, it's a small change and a reasonable speed-up for the default case (predicate=None). I'll give you co-authored-by credit!

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@AA-Turner AA-Turner merged commit 51e0f2b into python:main Mar 31, 2025
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@AA-Turner AA-Turner deleted the tw-indent branch March 31, 2025 17:31
@@ -0,0 +1,2 @@
Improved performance of :func:`textwrap.dedent` by an average of ~1.3x.
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s/dedent/indent/

seehwan pushed a commit to seehwan/cpython that referenced this pull request Apr 16, 2025
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3 participants