테스트 환경
/tmp/x $ uname -a Linux nude 3.2.0-27-generic #43-Ubuntu SMP Fri Jul 6 14:25:57 UTC 2012 x86_64 x86_64 x86_64 GNU/Linux /tmp/x $ python -V Python 2.7.3 /tmp/x $
소스
# -*- coding: utf-8 -*- import sys import os import subprocess import collections def mem(): p = subprocess.Popen(["ps", "-p", str(os.getpid()), "-o", "rss"], stdout=subprocess.PIPE, stderr=subprocess.PIPE) print "rss:", (p.stdout.read().split("\n")[1]) class OldStyleClass: def __init__(self,a,b,c,d,e,f): self.a,self.b,self.c,self.d,self.e,self.f = a,b,c,d,e,f NamedTuple = collections.namedtuple("NamedTuple", "a b c d e f") class NewStyleClassWithSlots(object): __slots__ = "a b c d e f".split() def __init__(self,a,b,c,d,e,f): self.a,self.b,self.c,self.d,self.e,self.f = a,b,c,d,e,f class NewStyleClass(object): def __init__(self,a,b,c,d,e,f): self.a,self.b,self.c,self.d,self.e,self.f = a,b,c,d,e,f def test(cnt,cls): print cls t = eval(cls) l = [t(i,i,i,i,i,i) for i in xrange(cnt)] mem() if __name__ == "__main__": test(int(sys.argv[1]), sys.argv[2])
결과
/tmp/x $ time python a.py 1000000 OldStyleClass OldStyleClass rss: 1157332 1.984 secs /tmp/x $ time python a.py 1000000 NamedTuple NamedTuple rss: 150764 1.139 secs /tmp/x $ time python a.py 1000000 NewStyleClassWithSlots NewStyleClassWithSlots rss: 134424 1.217 secs /tmp/x $ time python a.py 1000000 NewStyleClass NewStyleClass rss: 1149272 2.083 secs /tmp/x $
추가, 걍 tuple
/tmp/x $ time python a.py 1000000 "lambda *x: x" lambda *x: x rss: 144848 0.343 secs
