> The Pentium M and Pentium D are much more alike, architecturally, than > either and the Pentium 4,
[cpu rant] Off topic: not true. The Pentium D is the final Pentium 4 netburst architecture based design. It is not at all close to the Pentium M. The M is much more a derivative of the pentium pro,ii,iii, & iii-m before it as core and more distantly core2 are follow ons to the M. Yes the D (50xx) and Woodcrest core2s (51xx) shared the same socket and front side bus but internally they are unrelated. [/cpu rant] Regardless comparing between different cpus doesn't matter, only the difference between runs on the same cpu. for instance on a 1.4Ghz efficeon: python2.5: 10 loops, best of 3: 932 msec per loop python 3.0a1 svn trunk: 10 loops, best of 3: 1.54 sec per loop (both compiled with gcc 4.1.2 -O3) which falls right smack in the middle of the measurements others were reporting in this thread. ;) Without looking into it at a much lower level, > it's hard to tell, but the difference between a 1MB and 2MB L2 cache > might make all the difference in 3.0 performance. doubtful, python's ceval core and the data representing the code being executed are both tiny. -gps
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