[Python-Dev] More optimisation ideas

[Nikolaus Rath]

On Feb 01 2016, mike.romberg at comcast.net wrote:
>>>>>> " " == Barry Warsaw <barry at python.org> writes: 
> 
>     >> On Feb 01, 2016, at 11:40 AM, R. David Murray wrote: 
>      
>     >> I don't know about anyone else, but on my own development 
>     >> systems it is not that unusual for me to *edit* the 
>     >> stdlib files (to add debug prints) while debugging my own 
>     >> programs.  Freeze would definitely interfere with that. 
>     >> I could, of course, install a separate source build on my 
>     >> dev system, but I thought it worth mentioning as a 
>     >> factor. 
> 
>    [snip] 
> 
>      > But even with system scripts, I do need to step through 
>      > them occasionally.  If it were a matter of changing a 
>      > shebang or invoking the script with a different Python 
>      > (e.g. /usr/bin/python3s vs. /usr/bin/python3) to get the 
>      > full unpacked source, that would be fine. 
> 
>   If the stdlib were to use implicit namespace packages 
> ( https://www.python.org/dev/peps/pep-0420/ ) and the various 
> loaders/importers as well, then python could do what I've done 
> with an embedded python application for years.  Freeze the 
> stdlib (or put it in a zipfile or whatever is fast).  Then 
> arrange PYTHONPATH to first look on the filesystem and then look 
> in the frozen/ziped storage.

Presumably that would eliminate the performance advantages of the 
frozen/zipped storage because now Python would still have to issue 
all the stat calls to first check for the existence of a .py file.


Best,
-Nikolaus
 
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