On Thu, 12 Mar 2020 at 17:42, Eric Wieser <wieser.eric+nu...@gmail.com> wrote: > As an example of these optimizations being valuable, see > https://github.com/numpy/numpy/pull/7997, which claims the optimization I > described at the beginning resulted in a 1.5x-2x speedup.
This speedup is observed only for large objects. I quote: > Heuristicly it seems to be beneficial around 400kb array sizes (which is > about the typical L2 cache size). I think anyway that this could be a good idea, without changing `del`. The problem is: how can Python knows that a generic operation will create a temporary variable? The change you linked was done specifically for ndarrays, that you know they are immutable. How can Python know that an object is an immutable? _______________________________________________ Python-ideas mailing list -- python-ideas@python.org To unsubscribe send an email to python-ideas-le...@python.org https://mail.python.org/mailman3/lists/python-ideas.python.org/ Message archived at https://mail.python.org/archives/list/python-ideas@python.org/message/JCDYIXBNA7V2W7CZNUWOEJZFQSEG3BQ2/ Code of Conduct: http://python.org/psf/codeofconduct/
