Discover why 'if not mylist' is twice as fast as 'len(mylist) == 0' by examining CPython's VM instructions and object memory access patterns.
  • antlion@lemmy.dbzer0.comEnglish
    4·
    1 year ago

    Could also compare against:

    if not len(mylist)

    That way this version isn’t evaluating two functions. The bool evaluation of an integer is false when zero, otherwise true.