# What make lightning build slow or fast ? CPU or VGA

**URL:** <https://forums.unrealengine.com/t/what-make-lightning-build-slow-or-fast-cpu-or-vga/376355>\
**Category:** Rendering\
**Tags:** unreal-engine\
**Created:** [November 15, 2016, 2:02pm UTC](https://forums.unrealengine.com/t/what-make-lightning-build-slow-or-fast-cpu-or-vga/376355 "2016-11-15T14:02:20Z")\
**Posts on this page:** 1\
**Showing post:** 4

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**Author:** ![Tim\_Hobson](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@Tim\_Hobson](https://forums.unrealengine.com/u/Tim_Hobson)\
**Post date:** [November 16, 2016, 9:53pm UTC](https://forums.unrealengine.com/t/what-make-lightning-build-slow-or-fast-cpu-or-vga/376355/4 "2016-11-16T21:53:37Z")

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In addition to the suggestions here use the Statistics Window to see what meshes are taking the longest to build for the scene. This can help you narrow down and optimize these that are taking longer.

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