# optimize GatherInformation?

**URL:** https://discourse.paraview.org/t/optimize-gatherinformation/5424
**Category:** ParaView Support
**Created:** [September 24, 2020, 4:00pm UTC](https://discourse.paraview.org/t/optimize-gatherinformation/5424 "2020-09-24T16:00:50Z")
**Posts on this page:** 3
**Page:** 1

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### Author: ![Dave\_DeMarle](https://discourse.paraview.org/user_avatar/discourse.paraview.org/dave_demarle/32/27_2.png) [@Dave\_DeMarle](https://discourse.paraview.org/u/Dave_DeMarle)
#### Post date: [September 24, 2020, 4:00pm UTC](https://discourse.paraview.org/t/optimize-gatherinformation/5424/1 "2020-09-24T16:00:50Z")

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I am generating some large volumes with fast uniform grid and the generation time, especially with SMP, is fine but the meta data gathering time is pretty bad, as in 4x longer than the data generation time in the example below.

Does anyone have any tricks up their sleeves to make that less painful?

```
        Execute FastUniformGrid1 id: 6862, **334.489** seconds
        Execute FastUniformGrid1(ExtractSelection:0) id: 6863, 2.2e-05 seconds
FastUniformGrid::GatherInformation, **1224.38** seconds
```

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### Author: ![utkarsh.ayachit](https://discourse.paraview.org/user_avatar/discourse.paraview.org/utkarsh.ayachit/32/39_2.png) [@utkarsh.ayachit](https://discourse.paraview.org/u/utkarsh.ayachit)
#### Post date: [September 24, 2020, 5:44pm UTC](https://discourse.paraview.org/t/optimize-gatherinformation/5424/2 "2020-09-24T17:44:11Z")

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I’d dig in `GatherInformation` to see what’s slow. I suspect it’s computing range on all arrays.

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<div class="post-metadata">

### Author: ![sharon](https://discourse.paraview.org/letter_avatar_proxy/v4/letter/s/67e7ee/32.png) [@sharon](https://discourse.paraview.org/u/sharon)
#### Post date: [October 2, 2020, 3:47pm UTC](https://discourse.paraview.org/t/optimize-gatherinformation/5424/3 "2020-10-02T15:47:05Z")

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Hi Utkarsh,  
any findings about the performance? I also found it really take some time compare to the whole rendering process…