Here are some stats to add :-) Dell PowerApp 120 Intel Pentium III (Coppermine) Dual 1Ghz, 1GB PC133 ECC SDRAM running in single proccessor mode [root@root]# python /home/zope/2-5-0/lib/python2.1/test/pystone.py Pystone(1.1) time for 10000 passes = 0.87 This machine benchmarks at 11494.3 pystones/second [root@root]# python /home/Python-2.1.3/Lib/test/pystone.py Pystone(1.1) time for 10000 passes = 0.86 This machine benchmarks at 11627.9 pystones/second [root@root]# python /usr/lib/python1.5/test/pystone.py Pystone(1.1) time for 10000 passes = 0.85 This machine benchmarks at 11764.7 pystones/second [root@root]# python /usr/lib/python2.1/test/pystone.py Pystone(1.1) time for 10000 passes = 0.86 This machine benchmarks at 11627.9 pystones/second [root@root]# python /usr/local/lib/python2.1/test/pystone.py Pystone(1.1) time for 10000 passes = 0.87 This machine benchmarks at 11494.3 pystones/second [root@root]# python /usr/src/redhat/BUILD/Python-2.1.3/Lib/test/pystone.py Pystone(1.1) time for 10000 passes = 0.85 This machine benchmarks at 11764.7 pystones/second Roel.