News for hackers. Stuff that matters.

A comment on Using Python's Bisect Module. Parent comment

Re:Using Python's Bisect Module by rahimnathwani on Sunday November 22, 2020 @07:12PM (#25182315)
Thanks. So it seems both were updated with 'key' at the same time: https://github.com/python/cpython/commit/871934d4cf00687b3d1...

Now I'm wondering - what is the point of the python version, if it will always be overridden by the C implementation? Are there circumstances (platforms, compile flags, ...) under which the C version would be unavailable when the python runtime is compiled?

[ Parent | on HN ]
Re:Using Python's Bisect Module by quietbritishjim on Monday November 23, 2020 @06:42AM (#25185706)
It may be that other Python implementations use CPython's standard library, or at least part of it.

I think that PyPy in particular does this, but I'm not 100% sure. I know for certain that it uses pure Python implementation of some modules from somewhere. One program I took great pains to be PyPy compatible ended up being a lot slower in it, and it turned out to be that the built-in sqlite3 module has a C implementation in CPython that's faster than the pure-Python version even when runing in PyPy.

[ Parent | on HN ]