I’ve made some quicks tests with latest unrar binary and Macpar Deluxe par2 64 bits binary :

This little script can help you to do the same tests and compare times with binaries included in my last build… if you want to play.

#!/bin/sh
FILE="folder/some"
echo "Repairing with new par2 64bits"
#removing some parts to have something to repair
rm $FILE.r0[01]>/dev/null
time par2/par2 r $FILE.par2>/dev/null

echo "\nRepairing with old par2 32bits"
#removing some parts to have something to repair
rm $FILE.r0[01]>/dev/null
time par2/par2old r $FILE.par2>/dev/null

echo "\nUnraring with new unrar 3.70"
time unrar/unrar e -o+ $FILE.rar>/dev/null

echo "\nUnraring with old unrar 3.66 beta"
time unrar/unrarold e -o+ $FILE.rar>/dev/null

Results : with my config (macbook pro santa rosa 2.4Ghz with 2Go Ram), there no signiticative speed improvements…

a zip file that contains everything needed to test is available here

You can post your results in comments