measuring a function time

[Albert Hopkins]

On Fri, 2010-07-30 at 14:28 +0200, Hrvoje Niksic wrote:
> Steven D'Aprano <steve at REMOVE-THIS-cybersource.com.au> writes:
> 
> > On Thu, 29 Jul 2010 14:42:58 +0200, Matteo Landi wrote:
> >
> >> This should be enough
> >> 
> >>>>>import time
> >>>>>tic = time.time()
> >>>>>function()
> >>>>>toc = time.time()
> >>>>>print toc - tic
> >
> > You're typing that in the interactive interpreter, which means the
> > timer is counting the seconds while you're typing subsequent
> > commands. At the very least, you need to put that code into a
> > function.
> 
> Or, trivially improved as follows:
> 
> >>> t0 = time.time(); function(); t1 = time.time()
> >>> print t1 - t0

I'll just throw this out.  I sometimes use a decorator to keep track of
a functions execution times:


        def timed_function(f):
            """Function decorator that records the execution time of a
        function"""
            import time
            def funct(*args, **kwargs):
                __starttime = time.time()
                result = f(*args, **kwargs)
                __endtime = time.time()
                funct.runtime = __endtime - __starttime
        
                return result
            return funct

Then

        >>> from goodies import timed_function
        >>> from time import sleep
        >>> @timed_function
        ... def test(n):
        ...     sleep(n)
        ... 
        >>> test(4)
        >>> test.runtime
        4.003864049911499

Works for simple stuff anyway.

-a