[Paraview] reducing load time?

[Michael Jackson]

Use Binary for a file that large. When you use XML you have the  
following overhead:

XML Parser.
Decompress the data
Decode the Base 64 into something readable

If you save it as a binary file you have the following overhead.

Read the data directly into a memory location.
Possibly byte swap the values (big endian to little endian)..

Use binary. Way faster.
_________________________________________________________
Mike Jackson                  mike.jackson at bluequartz.net
BlueQuartz Software                    www.bluequartz.net
Principal Software Engineer                  Dayton, Ohio

On Oct 15, 2008, at 4:48 PM, John Doe wrote:

> Hello,
>
> Thanks for the suggestion.  I assume that for double precision I am
> doing a base64 encoding for every number in the list?  Is compression
> worthwhile for floating point data?  Are there free compression
> libraries out there?
>
> Juan
>
> On Wed, Oct 15, 2008 at 3:26 PM, Berk Geveci  
> <berk.geveci at kitware.com> wrote:
>> ASCII XML is very slow to load because it uses the XML parser. For
>> large data, you should switch to a binary format.
>>
>> XML binary
>> legacy VTK
>> Exodus
>> Xdmf
>>
>> are a few choices.
>>
>> To see the difference in load time, save the data out as a binary vtu
>> or vtk file and load it back in.
>>
>> -berk
>>
>> On Wed, Oct 15, 2008 at 3:25 PM, John Doe <ufnoise at gmail.com> wrote:
>>> Hi,
>>>
>>> I have a 220 MB vtu file that is being loaded and it is taking at
>>> least 15 min to load the data.  Is there any option to reduce the
>>> amount of time paraview would take to load the data.  Or is there  
>>> some
>>> way I should be formatting my data.  The vtu file is in the ASCII  
>>> XML
>>> VTK format.
>>>
>>> Thanks,
>>>
>>> Juan
>>> _______________________________________________
>>> ParaView mailing list
>>> ParaView at paraview.org
>>> http://www.paraview.org/mailman/listinfo/paraview
>>>
>>
> _______________________________________________
> ParaView mailing list
> ParaView at paraview.org
> http://www.paraview.org/mailman/listinfo/paraview