M.-A. Lemburg wrote: > I was leaving those out already - only the codes named 'ERROR_*' > get included (see attached parser and generator).
Right. One might debate whether DNS_INFO_AXFR_COMPLETE (9751L) or WSAEACCES (10013L) should be included as well. I got a smaller source file as I included only forward mappings, and used a loop to create the backwards mappings. > Using a lookup object is not really clumsy - you can still access > all the values by attribute access. The only difference is that > they don't live in the module namespace, but get accessed via > an object. So how much space would that save? > I'm not worried about the disk space being used. The heap > memory usage is what's worrying: the import of the module lets > the non-shared memory size of the process grow by 700kB > on my AMD64 box. That number must be misleading somehow. There are 1510 strings, with a total length of 39972. There are 1510 integers also, and they all get added into three dictionaries. On a 32-bit machine, these should consume 76968 bytes for the strings (*), 18120 bytes for the integers, and 100000 bytes for the dict entries (**), for a total of 200000 bytes at run-time. On a 64-bit machine, the strings should consume 101128 bytes (***), the integers 24160, and the dict entries 200000 bytes, for a total of 325000 bytes. >From that, I would conclude that one should avoid 64-bit machines if one is worried about memory usage :-) Regards, Martin (*) assuming 20 bytes string header, 1 byte null-termination, and a rounding-up to the next multiple of 8 (**) assuming 12 bytes per dict entry in three dictionaries (winerror.__dict__, winerror.errorcode, interning dict), and assuming an average fill ratio of the dicts of 50% (***) assuming 40 bytes string header, provided long is a 64-bit type on that platform _______________________________________________ Python-Dev mailing list Python-Dev@python.org http://mail.python.org/mailman/listinfo/python-dev Unsubscribe: http://mail.python.org/mailman/options/python-dev/archive%40mail-archive.com
