[Python-Dev] Saving the hash value of tuples
Aahz
aahz at pythoncraft.com
Sat Apr 1 22:37:01 CEST 2006
On Sat, Apr 01, 2006, Noam Raphael wrote:
>
> I've found out that the hash value of tuples isn't saved after it's
> calculated. With strings it's different: the hash value of a string is
> calculated only on the first call to hash(string), and saved in the
> structure for future use. Saving the value makes dict lookup of tuples
> an operation with an amortized cost of O(1).
> [...]
> I will be happy to send a patch, if someone shows interest.
Regardless of whether anyone shows interest, please submit a patch! Then
post the URL back here. That way if someone gets interested in the
future, your code is still available.
--
Aahz (aahz at pythoncraft.com) <*> http://www.pythoncraft.com/
"Look, it's your affair if you want to play with five people, but don't
go calling it doubles." --John Cleese anticipates Usenet
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