[Python-Dev] Optimization targets
jeremy at alum.mit.edu
Thu Apr 15 23:25:56 EDT 2004
On Thu, 2004-04-15 at 15:07, "Martin v. Löwis" wrote:
> Jeremy Hylton wrote:
> > Another question that I'd love to hear the answer to: What's the
> > difference between Pysco and something like this Self implementation or
> > the HotSpot Java implementation?
> Psyco is specializing, and that is the main difference compared
> to Java Hotspot. If you have a program
That's a helpful clarification, thanks.
> In Hotspot, the type of f would already be defined in the Java
> source code, and Hotspot generates native machine instructions
> for it.
> The changes over standard JIT appear to be inlining; it also
> appears to do inlining of virtual functions, combined with
> a type check to detect cases where the a different functions
> should have been called compared to the last time the virtual
> call was made.
I'm not sure what you mean by the changes over standard JIT. Do you
mean the difference between Hotspot and "standard JIT"? Your
descriptions sounds a bit like the Deutsch and Schiffman inline method
cache, which doesn't inline the method body but does inline the method
lookup. Or does Hotspot actually inline methods?
More information about the Python-Dev