# High CPU use for editor

**URL:** <https://forum.makecode.com/t/high-cpu-use-for-editor/9392>\
**Category:** Help\
**Created:** [July 26, 2021, 4:05pm UTC](https://forum.makecode.com/t/high-cpu-use-for-editor/9392 "2021-07-26T16:05:55Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![kwx](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.makecode.com/kwx/32/1545_2.png) [@kwx](https://forum.makecode.com/u/kwx)\
**Post date:** [July 26, 2021, 4:05pm UTC](https://forum.makecode.com/t/high-cpu-use-for-editor/9392/1 "2021-07-26T16:05:55Z")

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I’m seeing constant CPU usage for the [arcade.makecode.com](http://arcade.makecode.com) editor, even when it’s idle and while I’ve stopped the emulator. Is that expected or is there a bug here somewhere? This is on a Chromebook with Chrome 91.0.4472.167. Here’s a screenshot:

 ![Screenshot 2021-07-24 15.33.00](https://us1.discourse-cdn.com/flex020/uploads/makecode/original/2X/e/ed40a46fb75d485dd48e84a3afee7d8c942778de.png)

I was planning on working on a game on a flight, but this will seriously cut into the laptop battery life if it’s constantly maxing out a CPU core, and it keeps spinning up the fan. ☹

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<div class="post-metadata">

**Author:** ![kwx](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.makecode.com/kwx/32/1545_2.png) [@kwx](https://forum.makecode.com/u/kwx)\
**Post date:** [August 11, 2021, 11:08pm UTC](https://forum.makecode.com/t/high-cpu-use-for-editor/9392/2 "2021-08-11T23:08:05Z")

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In case it helps, it seems that the current beta editor at [https://arcade.makecode.com/beta#editor](https://arcade.makecode.com/beta#editor) is better behaved:

arcade version: [1.5.42](https://github.com/microsoft/pxt-arcade/releases/tag/v1.5.42)

Microsoft MakeCode version: [7.1.20](https://github.com/Microsoft/pxt/releases/tag/v7.1.20)

codal-itsybitsy-m4 runtime version: [v0.2.7](https://github.com/lancaster-university/codal-itsybitsy-m4/releases/tag/v0.2.7)

Most importantly, the usage now seems to drop to zero reliably while the editor tab isn’t active, and appears to settle down at 12% usage while active. (That’s with the emulator paused, usage goes up while that’s active but that’s expected.)