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abhi9u@lemmy.world to Technology@lemmy.worldEnglish · 27 days ago

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

blog.codingconfessions.com

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  • python@programming.dev
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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 · 27 days ago
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  • cross-posted to:
  • python@programming.dev
Discover why 'if not mylist' is twice as fast as 'len(mylist) == 0' by examining CPython's VM instructions and object memory access patterns.
  • ne0n@lemmy.world
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    26 days ago

    Isn’t “-2x faster” 2x slower?

    • ChaoticNeutralCzech@feddit.org
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      26 days ago

      That woulb be 0.5x. −2x implies negative duration, which makes no sense. Neither does the layout of anything else in the image.

    • sugar_in_your_tea@sh.itjust.works
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      26 days ago

      I think it was supposed to be a ~, since they use that in a paragraph below the image.

      • Phoenixz@lemmy.ca
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        26 days ago

        Blame AI

        • sugar_in_your_tea@sh.itjust.works
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          26 days ago

          It probably is AI. Either that, or a drunken stupor that produced that graph.

    • Randelung@lemmy.world
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      26 days ago

      Maybe they mean up to?

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