# Paraview very slow (openfoam installation)

**URL:** https://discourse.paraview.org/t/paraview-very-slow-openfoam-installation/8320
**Category:** ParaView Support
**Created:** [November 4, 2021, 12:34pm UTC](https://discourse.paraview.org/t/paraview-very-slow-openfoam-installation/8320 "2021-11-04T12:34:51Z")
**Posts on this page:** 5
**Page:** 1

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### Author: ![jhs](https://discourse.paraview.org/user_avatar/discourse.paraview.org/jhs/32/7871_2.png) [@jhs](https://discourse.paraview.org/u/jhs)
#### Post date: [November 4, 2021, 12:34pm UTC](https://discourse.paraview.org/t/paraview-very-slow-openfoam-installation/8320/1 "2021-11-04T12:34:51Z")

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If I run ParaView (5.6 64 bit) installed with the OpenFOAM installer and run it from the command line it is very slow (rendering .stl or other larges meshes).

I downloaded the precompiled version from the website and that runs very well and appropriately fast.

Any ideas why and how I could fix that? Thanks.

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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: [November 4, 2021, 12:35pm UTC](https://discourse.paraview.org/t/paraview-very-slow-openfoam-installation/8320/2 "2021-11-04T12:35:28Z")

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Use paraview from [www.paraview.org/download](http://www.paraview.org/download), do not use the one from OpenFOAM.

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### Author: ![jhs](https://discourse.paraview.org/user_avatar/discourse.paraview.org/jhs/32/7871_2.png) [@jhs](https://discourse.paraview.org/u/jhs)
#### Post date: [November 4, 2021, 12:36pm UTC](https://discourse.paraview.org/t/paraview-very-slow-openfoam-installation/8320/3 "2021-11-04T12:36:32Z")

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Ok. I’ll do that.

Why? (Just for my understanding)

Thanks

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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: [November 4, 2021, 12:41pm UTC](https://discourse.paraview.org/t/paraview-very-slow-openfoam-installation/8320/4 "2021-11-04T12:41:20Z")

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OpenFOAM version probably does not enable critical optimization component like SMP, maybe rely on mesa for rendering ? tbh this is a question OpenFOAM dev.

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### Author: ![olesenm](https://discourse.paraview.org/user_avatar/discourse.paraview.org/olesenm/32/17416_2.png) [@olesenm](https://discourse.paraview.org/u/olesenm)
#### Post date: [November 4, 2021, 3:37pm UTC](https://discourse.paraview.org/t/paraview-very-slow-openfoam-installation/8320/5 "2021-11-04T15:37:49Z")

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I agree with Mathieu.

> [@I want to visualize my OpenFOAM simulation results with ParaView but I'm confused, which version should I use ?](https://discourse.paraview.org/t/i-want-to-visualize-my-openfoam-simulation-results-with-paraview-but-im-confused-which-version-should-i-use/7232):
>
> Short Answer: go to [paraview.org/download](http://paraview.org/download) download the last version of ParaView available Use it to visualize your results Long Answer: OpenFOAM ships with a script named paraFoam, which can be used to call ParaView with custom OpenFOAM-specific reader modules, as well as with the standard reader that comes with ParaView/VTK. As stated in the OpenFOAM wiki, There is almost no reason to use these particular reader modules instead of the official binary release. Also, this discourse can…

> **[visualization · Wiki · Development / openfoam · GitLab](https://develop.openfoam.com/Development/openfoam/-/wikis/modules/visualization#do-i-really-need-the-paraview-plugins)**
>
> See openfoam code wiki for build and upgrade information, binaries ...