# Poor performance for high number of timesteps

**URL:** https://discourse.paraview.org/t/poor-performance-for-high-number-of-timesteps/13815
**Category:** ParaView Support
**Tags:** vtk
**Created:** [January 28, 2024, 10:01pm UTC](https://discourse.paraview.org/t/poor-performance-for-high-number-of-timesteps/13815 "2024-01-28T22:01:11Z")
**Posts on this page:** 10
**Page:** 1

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### Author: ![SchnFlo](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/s/48db29/32.png) [@SchnFlo](https://discourse.paraview.org/u/SchnFlo)
#### Post date: [January 28, 2024, 10:01pm UTC](https://discourse.paraview.org/t/poor-performance-for-high-number-of-timesteps/13815/1 "2024-01-28T22:01:11Z")

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Hello! I am new to ParaView/Vtk and am looking for some guidance. Currently I am testing vtk-xmlUnstructuredGrids as a possible output format for a project. I tested the following sets in the paraview Render-View:

- 7000 cells / 100 Time steps —\> 25 Fps
- 6 cells / 32 000 Time steps —\> 2Fps

Is there an obvious reason for this performance drop? Should I use a different vtk File Format? Can I improve the ParaView performance apart from activating animation cache?

Thanks a lot in advance!

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### Author: ![cory.quammen](https://discourse.paraview.org/user_avatar/discourse.paraview.org/cory.quammen/32/11193_2.png) [@cory.quammen](https://discourse.paraview.org/u/cory.quammen)
#### Post date: [January 29, 2024, 1:04am UTC](https://discourse.paraview.org/t/poor-performance-for-high-number-of-timesteps/13815/2 "2024-01-29T01:04:19Z")

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Hi @SchnFlo.

Welcome to the ParaView community!

Which version of ParaView and which operating system are you using?

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### Author: ![SchnFlo](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/s/48db29/32.png) [@SchnFlo](https://discourse.paraview.org/u/SchnFlo)
#### Post date: [January 29, 2024, 8:01am UTC](https://discourse.paraview.org/t/poor-performance-for-high-number-of-timesteps/13815/3 "2024-01-29T08:01:06Z")

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Thank you for the fast reply!  
I tested the set on two configurations :

- Arch Linux (Workstation)

- Windows 11(Mobile)

The above mentioned benchmarks were created on the workstation. The poor performance can be seen on both configurations.

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### 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: [January 29, 2024, 8:09am UTC](https://discourse.paraview.org/t/poor-performance-for-high-number-of-timesteps/13815/4 "2024-01-29T08:09:21Z")

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could you share that data ?

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### Author: ![SchnFlo](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/s/48db29/32.png) [@SchnFlo](https://discourse.paraview.org/u/SchnFlo)
#### Post date: [January 29, 2024, 8:19am UTC](https://discourse.paraview.org/t/poor-performance-for-high-number-of-timesteps/13815/5 "2024-01-29T08:19:45Z")

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Of course! You can find the two data sets [here.](https://sendgb.com/SOCKmhGaVw5)

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### 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: [January 29, 2024, 9:49am UTC](https://discourse.paraview.org/t/poor-performance-for-high-number-of-timesteps/13815/6 "2024-01-29T09:49:10Z")

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I confirm that there is a significant performance difference caused by the number of timesteps.

FYI @nicolas.vuaille

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### 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: [January 29, 2024, 9:49am UTC](https://discourse.paraview.org/t/poor-performance-for-high-number-of-timesteps/13815/7 "2024-01-29T09:49:35Z")

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@SchnFlo could you open an issue ?

[https://gitlab.kitware.com/paraview/paraview/-/issues](https://gitlab.kitware.com/paraview/paraview/-/issues)

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### Author: ![nicolas.vuaille](https://discourse.paraview.org/user_avatar/discourse.paraview.org/nicolas.vuaille/32/5873_2.png) [@nicolas.vuaille](https://discourse.paraview.org/u/nicolas.vuaille)
#### Post date: [January 29, 2024, 10:27am UTC](https://discourse.paraview.org/t/poor-performance-for-high-number-of-timesteps/13815/8 "2024-01-29T10:27:20Z")

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Hi,

FYI, I was also able to reproduce from paraview application, but not from pvpython. So it is more probably a GUI-related issue.

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### Author: ![wascott](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/w/8e8cbc/32.png) [@wascott](https://discourse.paraview.org/u/wascott)
#### Post date: [January 29, 2024, 5:08pm UTC](https://discourse.paraview.org/t/poor-performance-for-high-number-of-timesteps/13815/9 "2024-01-29T17:08:03Z")

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Please post the link to the issue in git here. I will fund it.

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### Author: ![SchnFlo](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/s/48db29/32.png) [@SchnFlo](https://discourse.paraview.org/u/SchnFlo)
#### Post date: [January 29, 2024, 6:34pm UTC](https://discourse.paraview.org/t/poor-performance-for-high-number-of-timesteps/13815/10 "2024-01-29T18:34:06Z")

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[git issue](https://gitlab.kitware.com/paraview/paraview/-/issues/22467). Thank you!