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Python Performance: Why 'if not list' is 2x Faster Than Using len()
(blog.codingconfessions.com)
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this post was submitted on 24 Apr 2025
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Python
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I don't know about others ... but I'm not using Python for execution speed.
Typically the biggest problem in a program is not 100 million calls of
len(x) == 0. If it was, the interpreter could just translate that expression during parsing.I mean, nobody uses Python for execution speed precisely because it is so slow.