[Python-Dev] python optimization

[Chris Cioffi]

Hi Neal,
 I don't believe that cpython currently does any of the optimizations you 
refer to below. That said, it is very reasonable to adopt "a style of coding 
that is highly readable, making the assumption that the compiler will do 
good things" when coding in Python. Python is one of the most highly 
optimised languages in the world along the Programmer Productivity metric. 
Line for line, you can pack more readable, obvious, and maintainable meaning 
into Python than pretty much any other language.
 The upshot is that then you can profile the final running code and see if 
it really matters that the compiler is using an extra .034 microseconds. 

That's my $0.028 US (damn inflation!)
 On 15/09/05, Neal Becker <ndbecker2 at gmail.com> wrote: 
> 
> I use cpython. I'm accustomed (from c++/gcc) to a style of coding that is
> highly readable, making the assumption that the compiler will do good
> things to optimize the code despite the style in which it's written. For
> example, I assume constants are removed from loops. In general, an entity
> is defined as close to the point of usage as possible.
> 
> I don't know to what extent these kind of optimizations are available to
> cpython. For example, are constant calculations removed from loops? How
> about functions? Is there a significant cost to putting a function def
> inside a loop rather than outside?
> 
> --
> http://mail.python.org/mailman/listinfo/python-list
> 



-- 
"A little government and a little luck are necessary in life, but only a 
fool trusts either of them." -- P. J. O'Rourke
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