Re: [Psyco-devel] Re: selective compilation

[Samuele P. <ped...@bl...>]

[Armin Rigo]
> 
> Kjetil Jacobsen wrote:
> > the problem with the current approach to selective compilation is that a
> > function may be called only once and still account for most of the
> > computation time.
> 
> Yes, sure. Well, even with deep messing into Python's internals, I
> believe it would be difficult and wrong to try to start compiling a
> function in the middle of its execution; so it means that we cannot
> handle the case of long functions only executed once.

A question: it is because it is ineherently difficult to start compiling
 from the middle of an execution given psyco approach?

From my readings a typical approach to detect the need
of compilation for long running methods is to count "looping"
(e.g. decrementing a counter 
associated with the function on every looping (back) branch 
and triggering compilation when it reaches zero. )
So at least compilation would be naturally 
triggered at a merge-point, could this help?


regards, Samuele Pedroni.