# High energy consumption?

**URL:** <https://discourse.threejs.org/t/high-energy-consumption/22909>\
**Category:** Questions\
**Tags:** performance\
**Created:** [January 28, 2021, 9:23am UTC](https://discourse.threejs.org/t/high-energy-consumption/22909 "2021-01-28T09:23:48Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![suhdonghwi](https://yyz1.discourse-cdn.com/flex035/user_avatar/discourse.threejs.org/suhdonghwi/32/15962_2.png) [@suhdonghwi](https://discourse.threejs.org/u/suhdonghwi)\
**Post date:** [January 28, 2021, 9:23am UTC](https://discourse.threejs.org/t/high-energy-consumption/22909/1 "2021-01-28T09:23:48Z")

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My three.js app does not have much meshes(around 200 in total), and it renders with 50~60 fps. But when I run my app for a few minutes, Safari browser warns that “This webpage is using significant energy […]”

Can someone provide tips for reducing energy consumption?

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**Author:** ![Mugen87](https://yyz1.discourse-cdn.com/flex035/user_avatar/discourse.threejs.org/mugen87/32/5645_2.png) [@Mugen87](https://discourse.threejs.org/u/Mugen87)\
**Post date:** [January 28, 2021, 9:41am UTC](https://discourse.threejs.org/t/high-energy-consumption/22909/2 "2021-01-28T09:41:15Z")

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It’s hard to provide feedback for your question since it would be necessary to make a performance analysis. If you now the bottlenecks of your app, you can start introducing optimizations which will then improve the performance and lower the battery consumption.

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**Author:** ![becky\_rose](https://yyz1.discourse-cdn.com/flex035/user_avatar/discourse.threejs.org/becky_rose/32/15933_2.png) [@becky\_rose](https://discourse.threejs.org/u/becky_rose)\
**Post date:** [January 28, 2021, 10:53am UTC](https://discourse.threejs.org/t/high-energy-consumption/22909/3 "2021-01-28T10:53:17Z")

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Your computer may not be doing much, but by default you’d be telling it to do those things repeatedly… You could run at a lower frame rate by wrapping the requestAnimationFrame() call in a timeout or other kind of delay.

Another thing to consider, most noteably on laptops, is telling the threeJs renderer to use low-power mode.

```
renderer = new THREE.WebGLRenderer({
  powerPreference: 'low-power' /* This can also be 'high-performance' */
});

```

I hope that helps.