[Tutor] measuring the start up time of an event-driven program

[Albert-Jan Roskam]

Albert-Jan Roskam, 24.07.2012 11:18:
>> I would like to test how long it takes for two versions of the same
>> program to start up and be ready to receive commands. The program is
>> SPSS version-very-old vs. SPSS version-latest.
>> 
>> Normally I'd just fire the program up in a subprocess and measure the
>> time before and after finishing. But this kind of program is never
>> finished. It's looping until infinity and waiting for events/commands. I
>> tried wrapping it in a "while True" loop, and break out of the loop and
>> terminate the program (using ctypes) if the retcode of the process is
>> equal to zero. But that doesn't work.
>
>Is it really looping or is it just sitting and waiting for input? You might
>be able to provide some input that makes it terminate.
>
>Stefan
>
>===> Good idea. And thanks everybody for replying. I solved it by using SendKeys-ctypes-0.2.
>I couldn't use pywin32 -- no rights to install this :-((
>Here's a fragment (it won't work on an english locale, I think. Replace 'u' with 'r' (for "Run...").
>    start = time.clock()
>    if windows_version == "Windows 2000" and spss_version == 14:
>        SendKeys.SendKeys("""{LWIN}
>            {PAUSE 0.25}
>            u
>            %s{ENTER}
>            {PAUSE %2.1f}
>            %%{TAB 2}
>            %%{F4}""" % (spss_path, PAUSE), with_spaces=True)
>    elif windows_version == "Windows 7":
>        SendKeys.SendKeys("""{LWIN}
>            {PAUSE 0.25}
>            %s{ENTER}
>            {PAUSE %2.1f}
>            %%{TAB}
>            %%{F4}""" % (spss_path, PAUSE), with_spaces=True)
>    end = time.clock()
>    duration = (end - start) 

________________________________
From: Stefan Behnel <stefan_ml at behnel.de>
To: tutor at python.org 
Sent: Tuesday, July 24, 2012 2:29 PM
Subject: Re: [Tutor] measuring the start up time of an event-driven program
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