> $ python -m timeit -s 'l=[]' 'len(l)==1000' > 1000000 loops, best of 3: 0.256 usec per loop > $ python -m timeit -s 'l=[]' 'len(l)==1000' > 1000000 loops, best of 3: 0.27 usec per loop > > $ python -m timeit -s 'l=[]' 's=len(l); s==1000' > 1000000 loops, best of 3: 0.287 usec per loop > $ python -m timeit -s 'l=[]' 's=len(l); s==1000' > 1000000 loops, best of 3: 0.299 usec per loop
More results pretty much agree with yours: C:\Python25>python -m timeit -s 'l=range(1000)' 'len(l)==1000' 10000000 loops, best of 3: 0.0235 usec per loop C:\Python25>python -m timeit -s 'l=range(1000)' 'len(l)==1000' 10000000 loops, best of 3: 0.0245 usec per loop C:\Python25>python -m timeit -s 'l=range(1000)' 's=len(l)' 's==1000' 10000000 loops, best of 3: 0.0383 usec per loop C:\Python25>python -m timeit -s 'l=range(1000)' 's=len(l)' 's==1000' 10000000 loops, best of 3: 0.038 usec per loop -- http://mail.python.org/mailman/listinfo/python-list
