[Paraview] Help with optimizing Paraview Python script

[Cory Quammen]

A few questions:

* How did you obtain the ParaView executable? (download, build)? If you
built ParaView in Debug mode, that could slow things down.

* How big are your data files, both in terms of disk size and grid elements?

* How much RAM is on your system?

- Cory

On Wed, Oct 21, 2015 at 8:50 PM, Andy Bauer <andy.bauer at kitware.com> wrote:

> Did you profile this at all to see where most of the time being spent?
>
> Looking at this, I don't see anything really bad. I think you can take out
> the time.sleep(1.0) part though. Also, replacing the Calculator filter with
> the PythonCalculator filter should help some. If you're running this in
> parallel, the fetch is probably hurting performance as well.
>
> On Wed, Oct 21, 2015 at 4:02 PM, Neal,Christopher R <chrisneal at ufl.edu>
> wrote:
>
>> Hello,
>>
>>
>> I have written a python script that loads in an Ensight data file which
>> has multiple solution times associated with it and performs a set of fairly
>> simple operations on it. It is running very slow, and I'm wondering if
>> there are any experts who use Python to control Paraview that could help me
>> to optimize the script.  In a nutshell the script does the following.
>>
>>
>> 1.) Go to a timestep
>>
>> 2.) Generate a series of 2D slices in the 3D domain
>>
>> 3.) Compute some values of the solution variables on those slices
>>
>> 4.) Write data to a file
>>
>> 5.) Delete the entire pipeline except the original data
>>
>> 6.) Go back to 1.)
>>
>>
>> This process is painfully slow(2+days just to run the script on a modest
>> size data set).  I believe that the script having to delete the pipeline
>> and then re-create it for every timestep is contributing to the slowdown.
>> My  trouble is that I do not know how to selectively activate certain
>> elements in the pipeline if I want to extract information from them, so I
>> have to add them sequentially so that the newest one is the active one.
>> The script may also be rendering each step, which is unnecessary for me,
>> but I do not know how to disable that as well.
>>
>>
>> I have attached a copy of the script. I have a minimal working example
>> that contains the data set with only 3 timesteps worth of data.
>>
>>
>> I am even willing to pay  $100 for an expert to help me out with this.
>>
>>
>> Thank you,
>>
>>
>> Christopher R. Neal
>> Graduate Student
>> Center for Compressible Multiphase Turbulence
>> Mechanical and Aerospace Engineering Department
>> University of Florida
>> Cell: (863)-697-1958
>> E-mail:  chrisneal at ufl.edu
>>
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>>
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>>
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>>
>
> _______________________________________________
> Powered by www.kitware.com
>
> Visit other Kitware open-source projects at
> http://www.kitware.com/opensource/opensource.html
>
> Please keep messages on-topic and check the ParaView Wiki at:
> http://paraview.org/Wiki/ParaView
>
> Search the list archives at: http://markmail.org/search/?q=ParaView
>
> Follow this link to subscribe/unsubscribe:
> http://public.kitware.com/mailman/listinfo/paraview
>
>


-- 
Cory Quammen
R&D Engineer
Kitware, Inc.
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