Benchmarking some modules - strange result

Dan Stromberg drsalists at gmail.com
Sun Jan 25 03:36:01 CET 2015


On Sat, Jan 24, 2015 at 6:24 PM, Chris Angelico <rosuav at gmail.com> wrote:
> On Sun, Jan 25, 2015 at 1:11 PM, Dan Stromberg <drsalists at gmail.com> wrote:
>> For simplicity, let's say I've been running the suite of performance
>> tests within a single interpreter - so I test one module thoroughly,
>> then move on to the next without exiting the interpreter.
>> [chomp more details]
>
> Do the modules import stuff that's staying imported? That could
> majorly affect performance. What about .pyc files?

The modules are all imported up at the top of the script.  I haven't
verified this, but I'm guessing the .pyc's are created at the
beginning too.

> I don't know if you can truly reset the interpreter. Snapshotting
> sys.modules and reinstating it afterwards would help, but there are
> other concerns too. I would personally just restart the interpreter
> each time, frankly; it's the easiest way to be sure.

Maybe so ^_^



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