On 14 Mar 2014, at 7:39 AM, horridohobbyist <[email protected]> wrote: > Okay, version 2.6.5 is verified. No difference in the Python version. > > So how to explain the performance difference?
It's getting to be interesting. To make the result more robust, I'd try it with a much bigger range, maybe 100x, to be sure that the per-loop time is dominating the report. And just for the heck of it I'd replace range with xrange to see if it makes any difference at all. Something else to keep in mind, especially if you're running this on a shared VM, is that time.time() is giving you clock time, and that can lead to very random results in a shared-hardware environment. Or even in a non-shared one, if there's any other system activity going on. The only way around that is to repeat the experiment a lot (which you're doing, sounds like). > > > On Friday, 14 March 2014 09:36:29 UTC-4, Jonathan Lundell wrote: > On 14 Mar 2014, at 6:28 AM, horridohobbyist <[email protected]> wrote: >> I conducted a simple experiment. I took the "Welcome" app, surely the >> simplest you can have (no databases, no concurrency, etc.), and added the >> following to the index page: >> >> def test(): >> start = time.time() >> x = 0.0 >> for i in range(1,5000): >> x += (float(i+10)*(i+25)+175.0)/3.14 >> debug("elapsed time: "+str(time.time()-start)) >> return >> >> I get an elapsed time of 0.103 seconds. >> >> The same exact code in a command line program... >> >> if __name__ == '__main__': >> test() >> >> gives an elapsed time of 0.003 seconds. That's 35 times faster! It's not the >> 2 orders of magnitude I'm seeing in the pyShipping code, but my point is >> proven. There is something hinky about web2py that makes Python code execute >> much more slowly. Is web2py using a different Python version? As far as I >> can tell, I only have Python 2.6.5 installed on my Linux server. >> > > Easy enough to find out: print sys.version. -- Resources: - http://web2py.com - http://web2py.com/book (Documentation) - http://github.com/web2py/web2py (Source code) - https://code.google.com/p/web2py/issues/list (Report Issues) --- You received this message because you are subscribed to the Google Groups "web2py-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. For more options, visit https://groups.google.com/d/optout.
