How we made Python's packaging library 3x faster

4 comments

• djoldman an hour ago

  > _canonicalize_table = str.maketrans( "ABCDEFGHIJKLMNOPQRSTUVWXYZ_.", "abcdefghijklmnopqrstuvwxyz--", )

  > ...

  > value = name.translate(_canonicalize_table)

  > while "--" in value:

  > value = value.replace("--", "-")

  translate can be wildly fast compared to some commonly used regexes or replacements.

  [-]
  • est 2 minutes ago

    I am curious, why not .lower().translate('_.', '--')

  • teaearlgraycold 38 minutes ago

    I would expect however that a regex replacement would be much faster than your N^2 while loop.

• zahlman 3 days ago

  Previously: https://news.ycombinator.com/item?id=46557542