# Overactive fans and slow preview generation

**URL:** <https://forums.realmacsoftware.com/t/overactive-fans-and-slow-preview-generation/39805>\
**Category:** RapidWeaver Classic\
**Created:** [June 30, 2021, 3:15pm UTC](https://forums.realmacsoftware.com/t/overactive-fans-and-slow-preview-generation/39805 "2021-06-30T15:15:27Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![manofdogz](https://dub1.discourse-cdn.com/flex005/user_avatar/forums.realmacsoftware.com/manofdogz/32/26314_2.png) [@manofdogz](https://forums.realmacsoftware.com/u/manofdogz)\
**Post date:** [June 30, 2021, 3:15pm UTC](https://forums.realmacsoftware.com/t/overactive-fans-and-slow-preview-generation/39805/1 "2021-06-30T15:15:27Z")

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Not seen too much on this subject lately, but I have a lot of problems with preview generation being slow and fans going into overdrive. Lunching RW with 3rd party plugins, themes disabled, and preview window reset solves both these problems - so it appears not to be attributable to the core RW product.

Any plugins / themes I should be suspicious of? I have a lot!

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**Author:** ![robbeattie](https://dub1.discourse-cdn.com/flex005/user_avatar/forums.realmacsoftware.com/robbeattie/32/78_2.png) [@robbeattie](https://forums.realmacsoftware.com/u/robbeattie)\
**Post date:** [July 1, 2021, 9:50am UTC](https://forums.realmacsoftware.com/t/overactive-fans-and-slow-preview-generation/39805/2 "2021-07-01T09:50:34Z")

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I’ve got 2,000 stacks (gulp!) running on a six year old MacBook Pro with 8GB and am not experiencing any problems. I’d suggest it’s a plugin or a theme?

Suspicions would normally fall on older stuff, discontinued plugins or things that are known to have the occasional issue like PlusKit , so I guess I’d start with those?

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**Author:** ![system](https://dub1.discourse-cdn.com/flex005/user_avatar/forums.realmacsoftware.com/system/32/25301_2.png) [@system](https://forums.realmacsoftware.com/u/system)\
**Post date:** [July 31, 2021, 7:50pm UTC](https://forums.realmacsoftware.com/t/overactive-fans-and-slow-preview-generation/39805/3 "2021-07-31T19:50:48Z")

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