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Python Performance: Why 'if not list' is 2x Faster Than Using len() (blog.codingconfessions.com)
submitted 5 days ago by jnovinger@programming.dev to c/python@programming.dev
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[-] sugar_in_your_tea@sh.itjust.works 1 points 4 days ago

What's the extra logic?

if x:

This always evaluates to True if it's non-empty. There's no extra logic.

If you have to keep 12 things in your head, your code is poorly structured/documented. A given function should be simple, making it plainly obvious what it's intended to do. Use type hints to specify what a variable should be, and use static analysis to catch most deviations. The more you trust your tools, the more assumptions you can safely make.

this post was submitted on 24 Apr 2025
60 points (94.1% liked)

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