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Re: further // Benchmark - 64 bit much slower than 32

• To: mathgroup at smc.vnet.net
• Subject: [mg111779] Re: further // Benchmark - 64 bit much slower than 32
• From: Chris Pemberton <cjpembo at gmail.com>
• Date: Fri, 13 Aug 2010 06:54:40 -0400 (EDT)
• References: <201008120930.FAA12327@smc.vnet.net>

On 8/12/2010 4:30 AM, Scot T. Martin wrote:
> This issue is more subtle than outlined in the last email because I ran
> Benchmark[] on yet another computer that also has Windows 7 64-bit and got
> very good results. Here is a full comparison --- any insights on the slow
> one?
>
> **** FASTEST ****
> Intel(R) Core(TM) i5 CPU  650 @3.20GHz, 8.00 GB
> === System Information ===
> Machine Name:          smartin-t1500pc
> System:                Microsoft Windows (64-bit)
> Date:                  August 11, 2010
> Mathematica Version:   7.0.0
> Benchmark Result:      4.71
>
> smartin-t1500pc
> Microsoft Windows (64-bit)     18.3   1.05    0.36    0.52    1.22    1.67
> 0.22    0.50    1.81    2.11    1.08     1.84     1.34     1.11     1.59
> 1.89
>
>
> **** NEXT FASTEST ****
> Intel(R) Core(TM)2 Duo CPUE8500 at 3.16  Ghz, 2.75 GB RAM
> === System Information ===
> Machine Name:          martin2
> System:                Microsoft Windows (32-bit)
> Date:                  August 11, 2010
> Mathematica Version:   7.0.0
> Benchmark Result:      4.12
>
>
> martin2
> Microsoft Windows (32-bit)     20.9   1.20    0.59    0.83    1.25    1.89 0.44
> 0.77    2.61    1.83    1.42     2.05     1.45     1.25     1.42 1.91
>
>
>
> *** WAY TOO SLOW (new system) ***
> Intel(R) Xeon(R) CPU,W3680 at 3.33  GHz, 8.00 GB install, Windows 7 professional
> 64 bit
> === System Information ===
> Machine Name:          profmartinoffic
> System:                Microsoft Windows (64-bit)
> Date:                  August 11, 2010
> Mathematica Version:   7.0.0
> Benchmark Result:      1.13
>
> profmartinoffic
> Microsoft Windows (64-bit)     76.2   1.87    0.33    0.39    26.10   1.83 0.23
> 0.48    1.89    1.70    0.84     1.72     1.05     1.15     23.80 12.80
>
>
>
> original email:
>
> Folks, just installed Mathematica on new Windows 7 64-bit machine and
> Benchmark[] is much slower than on 32-bit Windows XP.
> MathematicaMark7 Rating of new system is 1.13 compared to 4.12 of old
> system.
>
> Any explanations for this? Details are below. Are many of Mathematica's
> routines still in 32-bit and thus slower on 64-bit
> machine? Is this an issue related to Windows XP compared to Windows 7
> vis-a-vis Mathematica?
>
> Needless to say, new system is much better in terms of CPU, memory, etc.,
> so this result is very surprising to me. I'd like to
> know what I can adjust to get a blazing Benchmark!
>
>
>    
Perhaps it is not Mathematica that is working poorly; perhaps something 
is mis-configured with your machine?  You can test your machine with 
free trial software from passmark:  (www.passmark.com) and then compare 
your results against thousands of other machines.  Might be useful if a 
problem exists independent of Mathematica.

• References:
  • further // Benchmark - 64 bit much slower than 32 bit (fwd)
    • From: "Scot T. Martin" <smartin@seas.harvard.edu>