On Wed, Nov 17, 2004 at 11:07:28PM +0100, Leopold Toetsch wrote: > $ parrot pmfactbsr.imc > 500500 > 3.459947 > > $ parrot -Oc pmfact.imc > 500500 > 1.237185 > > Now what ;) > Are you sure, that you can't do a tailcall sometimes?
Sure, p6ge already makes heavy use of tailcalls. In a bsr/ret scheme, the tail calls become branches (and, using a caller-saves convention, there's no saving/restoring of registers). So, we end up with: [EMAIL PROTECTED] pmichaud]$ parrot pmfact.imc 500500 5.950604 [EMAIL PROTECTED] pmichaud]$ parrot pmfactbsr.imc 500500 1.988304 [EMAIL PROTECTED] pmichaud]$ parrot -Oc pmfact.imc 500500 0.933195 [EMAIL PROTECTED] pmichaud]$ parrot -Oc pmfactbsrtail.imc 500500 0.221527 [EMAIL PROTECTED] pmichaud]$ perl -e 'print 0.93 / 0.22, "\n"' 4.22727272727273 > What about calling back into PIR code? Sure, I'll just use the standard PIR calling conventions for those-- no problem. Pm
