# large performance gap beween pvpython and paraview GUI

**URL:** https://discourse.paraview.org/t/large-performance-gap-beween-pvpython-and-paraview-gui/17559
**Category:** ParaView Support
**Created:** [May 11, 2026, 10:26am UTC](https://discourse.paraview.org/t/large-performance-gap-beween-pvpython-and-paraview-gui/17559 "2026-05-11T10:26:33Z")
**Posts on this page:** 3
**Page:** 1

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### Author: ![otaolafr](https://discourse.paraview.org/user_avatar/discourse.paraview.org/otaolafr/32/3595_2.png) [@otaolafr](https://discourse.paraview.org/u/otaolafr)
#### Post date: [May 11, 2026, 10:26am UTC](https://discourse.paraview.org/t/large-performance-gap-beween-pvpython-and-paraview-gui/17559/1 "2026-05-11T10:26:33Z")

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Hello,  
I have a script that takes raw data and analyze it, the script does not create absolutely no visualization whatsoever, once this is said, when i run the script from the python shell of the gui i see a large performance gap to what i am getting running the same script using pvpython.

one simply would continue using pvpython and leave it there, but i would like to manipulate the data visualize it, etc after the script is fully runned. so, in this case pvpython will not be of help, is there anything else i should turn on on the settings of paraview to have a smaller performance gap?  
I am getting 4 times between paraview gui vs pvpython.  
thanks  
on the preference of the paraview gui i have this as client information:

```auto
Client Information:
Version: 6.0.1
VTK Version: 9.5.2
Qt Version: 6.9.0
vtkIdType size: 64bits
Embedded Python: On
Python Library Path: /home/franco/Programs/ParaView/ParaView-6.0.1-MPI-Linux-Python3.12-x86_64/lib/python3.12
Python Library Version: 3.12.7 (main, Sep 25 2025, 18:56:46) [GCC 10.3.1 20210422 (Red Hat 10.3.1-1)]
Python Numpy Support: On
Python Numpy Path: /home/franco/Programs/ParaView/ParaView-6.0.1-MPI-Linux-Python3.12-x86_64/lib/python3.12/site-packages/numpy
Python Numpy Version: 1.26.4
Python Matplotlib Support: On
Python Matplotlib Path: /home/franco/Programs/ParaView/ParaView-6.0.1-MPI-Linux-Python3.12-x86_64/lib/python3.12/site-packages/matplotlib
Python Matplotlib Version: 3.7.2
Python Testing: Off
MPI Enabled: On
ParaView Build ID: superbuild 8c0f929966f005396802f3b2957c734a6c68b3c1 (!1292)
Disable Registry: Off
Test Directory: 
Data Directory: 
SMP Backend: TBB
SMP Max Number of Threads: 16
OpenGL Vendor: NVIDIA Corporation
OpenGL Version: 3.2.0 NVIDIA 570.195.03
OpenGL Renderer: NVIDIA T600 Laptop GPU/PCIe/SSE2
Accelerated filters overrides available: No

Connection Information:
Remote Connection: No

```

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<div class="post-metadata">

### Author: ![mwestphal](https://discourse.paraview.org/user_avatar/discourse.paraview.org/mwestphal/32/17_2.png) [@mwestphal](https://discourse.paraview.org/u/mwestphal)
#### Post date: [May 11, 2026, 11:25am UTC](https://discourse.paraview.org/t/large-performance-gap-beween-pvpython-and-paraview-gui/17559/2 "2026-05-11T11:25:38Z")

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> [@otaolafr](#):
>
> I am getting 4 times between paraview gui vs pvpython.

Definitely unexpected, you may want to share a reproducer python state file.

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### Author: ![Louis\_Gombert](https://discourse.paraview.org/user_avatar/discourse.paraview.org/louis_gombert/32/14576_2.png) [@Louis\_Gombert](https://discourse.paraview.org/u/Louis_Gombert)
#### Post date: [May 12, 2026, 9:21am UTC](https://discourse.paraview.org/t/large-performance-gap-beween-pvpython-and-paraview-gui/17559/3 "2026-05-12T09:21:29Z")

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The Qt GUI may update and cause overhead when the script is executing for various reasons. Hard to say without the script anyway.