[Paraview] Calculator performing poorly in ParaView-3-8 branch

[John Patchett]

Initial results show performance is repaired, on par with the March
Head build...
Thank You very much,
--John.

On Tue, Apr 13, 2010 at 2:20 PM, Utkarsh Ayachit
<utkarsh.ayachit at kitware.com> wrote:
> John,
>
> Attached is a patch. Can you verify that it overcomes the performance
> issues you are seeing? If so, I'll commit it to CVS and get in 3.8
> branch as well.
>
> Utkarsh
>
> On Tue, Apr 13, 2010 at 3:23 PM, John Patchett <patchett2002 at gmail.com> wrote:
>> I've noticed the calculator has started performing substantially
>> slower in the ParaView-3-8 branch when taking the magnitude of a
>> vector as compared to the Head before the branch.
>> I've attached a graph summarizing the performance degradation.  I used
>> the Mandelbrot source and took the magnitude of the coords vector to
>> collect data for the graph.
>> One of my machines averages nearly a 6x slowdown and the other a 4.5x slowdown.
>>
>> The *-march is a Head build  from 3/23/2010.
>> 3-8 is the branch as of yesterday afternoon.
>>
>> I (believe) the change that affected the calculator performance
>> happened after the branch as I noticed it after I updated the branch (
>> I wouldn't bet too much on this though)...  I don't know if the Head
>> is affected.
>>
>> Thanks,
>> --John Patchett.
>>
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>