On Wednesday 13 December 2006 18:07, Chao wrote: > I've been trying to develop some numerical codes with python, however > got disappointed. > > A very simple test, > > a = 1.0 > > for i in range(1000): > for j in range(1000): > a = a+1 > > unfortunately, it took 4.5 seconds to finish(my machines is fine. P4 > 3.0G, 1G RAM, it varies according to machine configuration, but should > be in the same level) > > for matlab, the same operation took 0.1 seconds, > > I use numpy & scipy, they solve the problem most of the times, but > there are cases you can't avoid loops by vectors. I appreciate the > elegancy of python so much, but I guess I have to gave it up in these > numerical codes.(image processing algorithms), for application > dev/scripting, it's still my first choice. > > A good news is that the same code takes ruby 9.8 seconds.
[EMAIL PROTECTED] ~]$ time python foo # where foo contained your exact code real 0m0.469s user 0m0.443s sys 0m0.017s 4.5 seconds? ouch. I've got somewhere near 1 second. Something sounds a little fishy b/c my machine is an AMD 3200+ (2.2GHz) w/ 1GB RAM. Yours is a lot faster in terms of clock speed. Anyway, do take a look at some of the available python compilers. They should help considerably. - Jonathan -- http://mail.python.org/mailman/listinfo/python-list
