Re: Importing Cheetah.Template.Template unusually slow?

On Thu, 28 Jan 2010, Matthew Beauregard wrote:

> On 28/01/2010, at 5:02 AM, R. Tyler Ballance wrote:
> 
> > 
> > On Wed, 27 Jan 2010, Matthew Beauregard wrote:
> > 
> >> Hi,
> >> 
> >> I was trying to speed up my CGI, and I worked out that the lion's share of execution time was taken up by the Cheetah import.  Is 0.7s unusually slow?  Where should I start in trying to speed it up?
> > 
> > What version are Cheetah are you running? I'm also curious if your machine
> > isn't generating a Template.pyc for Template.py, causing the interpreter to
> > generate new byte-code for every request.
> 
> Hi Tyler,
> 
> It's version 2.4.1, and the installer generated the pyc:
> 
> -rwxr-xr-x  1 root  admin  84747 27 Jan 21:37 /Library/Python/2.6/site-packages/Cheetah-2.4.1-py2.6-macosx-10.6-universal.egg/Cheetah/Template.py
> -rw-r--r--  1 root  admin  71104 27 Jan 21:37 /Library/Python/2.6/site-packages/Cheetah-2.4.1-py2.6-macosx-10.6-universal.egg/Cheetah/Template.pyc
> 
> 
> I did some other comparisons, all for Cheetah 2.4.1:
> OSX 10.6, system python 2.6.1:  0.7s
> OSX 10.5, system python 2.5.1:  0.7s
> OSX 10.6, macports python 2.6.4:  0.1s
> Ubuntu Hardy, python 2.5:  0.1s
> 
> So I guess I'd have to blame some interaction between Cheetah and Apple's framework python.  I'm not sure what to do next.

Interesting, I wonder what differes in the Apple build of Python.

> 
> 
> > It's also worth mentioning that in a CGI environment you are going to have some
> > bit of slow-down with imports to begin with, you can mitigate this by making
> > sure that a new instance of the interpreter isn't started for each requests,
> > allowing a single instance service thousands of requests (mod_python has some
> > options for this IIRC)
> 
> That'd be a massive job at this point, I think the project is welded to CGI.  But that 0.7s import accounts for something like 80% of the average execution time, solving it would be a big win.

Let me ponder on this for a while, at first glance there's not really a whole
lot of performance improvements that "leap out" at me when I look at the
module-level code in Template.py.

Cheers,
-R. Tyler Ballance
--------------------------------------
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