On Thu, Mar 1, 2012 at 7:29 PM, André Malo <nd@perlig.de> wrote:
- Caching. My data container objects (say, resultsets from a db or something) usually inherit from list or dict (sometimes also set) and are cached heavily. In order to ensure that they are not modified (accidentially), I have to choices: deepcopy or immutability. deepcopy is so expensive, that it's often cheaper to just leave out the cache. So I use immutability. (oh well, the objects are further restricted with __slots__)
Speaking of caching - functools.lru_cache currently has to do a fair bit of work in order to correctly cache keyword arguments. It's obviously a *solvable* problem even without frozendict in the collections module (it just stores the dict contents as a sorted tuple of 2-tuples), but it would still be interesting to compare the readability, speed and memory consumption differences of a version of lru_cache that used frozendict to cache the keyword arguments instead. Cheers, Nick. -- Nick Coghlan | ncoghlan@gmail.com | Brisbane, Australia