matplotlib

Mike,

Thank you, that's wonderful!  I knew dedent was a major speed problem, 
but I couldn't think of how to speed it up, and to my eye keeping the 
docstrings properly indented in the code makes a *huge* difference in 
readability.

Eric

mdboom@... wrote:
> Revision: 3744
>           http://matplotlib.svn.sourceforge.net/matplotlib/?rev=3744&view=rev
> Author:   mdboom
> Date:     2007-08-28 12:17:21 -0700 (Tue, 28 Aug 2007)
> 
> Log Message:
> -----------
> Use regular expressions to do dedenting.  This is ~15X faster than the
> old implementation.  dedent accounted for around 30% of the time spent
> in "import pylab", so was probably worthy of optimization, even if this
> regex approach is less clear.  The results are identical to the old
> implementation, with the exception of a single docstring (in
> backend_bases.py) that needed to be fixed.

Perhaps the difference is below the noise floor?  I was focusing only on 
startup time by running lsprofcalltree over a script containing only 
"import pylab".  In that context, dedent was the largest contributor to 
startup time (other than stuff in the stdlib and numpy) before this 
change.  But I would imagine that that over the total time of 
backend_driver.py and actually doing stuff like, say, *plotting* is 
fairly insignificant.

Cheers,
Mike

Eric Firing wrote:
> Mike,
> 
> After a quick test, I am puzzled: running "backend_driver.py Template"
> takes 0.49 minutes on my machine before and after this change, so the 
> dedenting time must have been less than I thought.
> 
> Eric
> 
> mdboom@... wrote:
>> Revision: 3744
>>           http://matplotlib.svn.sourceforge.net/matplotlib/?rev=3744&view=rev
>> Author:   mdboom
>> Date:     2007-08-28 12:17:21 -0700 (Tue, 28 Aug 2007)
>>
>> Log Message:
>> -----------
>> Use regular expressions to do dedenting.  This is ~15X faster than the
>> old implementation.  dedent accounted for around 30% of the time spent
>> in "import pylab", so was probably worthy of optimization, even if this
>> regex approach is less clear.  The results are identical to the old
>> implementation, with the exception of a single docstring (in
>> backend_bases.py) that needed to be fixed.
> 
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