4 ms·

On the other hand, the first 256 integers are singletons in python, so they aren't duplicated.

• hermitdev 7y ago
  0-255 (inclusive) are singletons, just to clarify.
  • saagarjha 7y ago
    [-5, 256]: https://github.com/python/cpython/blob/master/Objects/longobject.c#L18 https://github.com/python/cpython/blob/master/Objects/longob...
    • hermitdev 7y ago
      my bad. Maybe it used to be 0-255 and I'm just too old to remember the change?
• mswtk 7y ago
  Slightly pedantic correction: This is a performance optimization in CPython. I wouldn't be surprised if other implementations have something similar, but to my best knowledge, this behaviour isn't part of the standard.
  • merlincorey 7y ago
    > ... but to my best knowledge, this behaviour isn't part of the standard. To the best of my knowledge, Python isn't one such language with a standard, is it?
    • ben509 7y ago
      The standard is documented in PEPs[1]. CPython is the flagship implementation, and many PEPs discuss it directly, but if you're looking to write another Python, that's where you'd go. https://www.python.org/dev/peps/ https://www.python.org/dev/peps/