Discover why 'if not mylist' is twice as fast as 'len(mylist) == 0' by examining CPython's VM instructions and object memory access patterns.
  • riodoro1@lemmy.worldEnglish
    2·
    23 days ago

    That’s exactly what I was getting at. Getting length of an empty list would not even enter the loop.

    • ChaoticNeutralCzechEnglish
      1·
      23 days ago

      Yes. If it’s empty. But in cases where you need to check, it might as well not be.