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MathGroup Archive 2007

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Re: Famous Mathematica 5.0 not working with Mathematica 6?

  • To: mathgroup at smc.vnet.net
  • Subject: [mg77010] Re: Famous Mathematica 5.0 not working with Mathematica 6?
  • From: Jean-Marc Gulliet <jeanmarc.gulliet at gmail.com>
  • Date: Thu, 31 May 2007 03:37:08 -0400 (EDT)
  • Organization: The Open University, Milton Keynes, UK
  • References: <f3jif1$dpc$1@smc.vnet.net>

eric.laruelle at gmail.com wrote:
> Hello. I am performing an evaluation of Mathematica 6 with the demo
> version on both Windows XP 32 bits and OS X 10.4.9. However both crash
> when evaluating the famous Karl's Mathematica benchmark:
> http://www2.staff.fh-vorarlberg.ac.at/~ku/karl/timings50.html
> 
> Did anyone experience the same thing? Have you got any suggestion?
> Thank you.

Hi,

I have done some more testing, and the culprit seems to be the graphic 
engine. Having commented out the following two expressions from Karl's 
original notebook,

Timing[Plot3D[Sin[x y], {x, 0, 2 \[Pi]}, {y, 0, 2 \[Pi]},
    PlotPoints -> 4000, DisplayFunction -> Identity]][[1]],
Timing[Plot3D[Evaluate[q4[x, t]], {x, -40, 40}, {t, -40, 40},
    PlotPoints -> 2000, DisplayFunction -> Identity]][[1]]

Mathematica did not consume too much memory.

Moreover, if one loads the legacy graphic engine

In[1]:= << Version5`Graphics`

then evaluating the following expression

In[2]:= Plot3D[Sin[x y], {x, 0, 2 \[Pi]}, {y, 0, 2 \[Pi]},
  PlotPoints -> 4000, DisplayFunction -> Identity]

Out[2]= --SurfaceGraphics--

works fine. However, evaluating the same expression with the new graphic 
engine eats up all the memory available.

In[3]:= << Version6`Graphics`

In[4]:= Plot3D[Sin[x y], {x, 0, 2 \[Pi]}, {y, 0, 2 \[Pi]},
  PlotPoints -> 4000, DisplayFunction -> Identity]

Regards,
Jean-Marc




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