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abhi9u@lemmy.world to Technology@lemmy.worldEnglish · 26 days ago

Python Performance: Why 'if not list' is 2x Faster Than Using len()

blog.codingconfessions.com

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Python Performance: Why 'if not list' is 2x Faster Than Using len()

blog.codingconfessions.com

abhi9u@lemmy.world to Technology@lemmy.worldEnglish · 26 days ago
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Discover why 'if not mylist' is twice as fast as 'len(mylist) == 0' by examining CPython's VM instructions and object memory access patterns.
  • catloaf@lemm.ee
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    26 days ago

    You can make that assumption at your own peril.

    • WhyJiffie@sh.itjust.works
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      26 days ago

      I don’t think they are a minority

    • iAvicenna@lemmy.world
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      26 days ago

      If anything len tells you that it is a sequence or a collection, “not” does not tell you that. That I feel like is the main point of my objection.

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