# Optimisation, GPU visualizer help

**URL:** <https://forums.unrealengine.com/t/optimisation-gpu-visualizer-help/436034>\
**Category:** Debugging, Optimization, & Profiling\
**Tags:** GPU-Profiling, unreal-engine, fps, question\
**Created:** [October 20, 2018, 3:19pm UTC](https://forums.unrealengine.com/t/optimisation-gpu-visualizer-help/436034 "2018-10-20T15:19:08Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![DavidM](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@DavidM](https://forums.unrealengine.com/u/DavidM)\
**Post date:** [October 20, 2018, 3:19pm UTC](https://forums.unrealengine.com/t/optimisation-gpu-visualizer-help/436034/1 "2018-10-20T15:19:08Z")

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I’m trying to optimise the game but I can’t figure out what’s slowing it down. So to start with, the profiler claims a frame takes 5ms to render, which would be 177fps, but the editor actually takes 38ms. When I play the game standalone (outside of the editor) it’s about twice as fast, giving me ~50 fps. How can the number be so low in the profiler but then in reality be so bad?

 ![](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/a/3/2a3d1b50c25eef284c5685b656a7873ded237a5f.png)

Thanks for any help!

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**Author:** ![DavidM](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/8/5/28502927f1d97ba1051b3b47ccfe17233bf41ef0.png) [@DavidM](https://forums.unrealengine.com/u/DavidM)\
**Post date:** [October 20, 2018, 3:21pm UTC](https://forums.unrealengine.com/t/optimisation-gpu-visualizer-help/436034/2 "2018-10-20T15:21:00Z")

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Btw, the CPU (game) is much lower in the editor, so that shouldn’t be slowing things down:

![](https://d3kjluh73b9h9o.cloudfront.net/original/4X/2/e/d/2edcc3d162e52e039dc776dbe5d6b7980bb6d43e.png)

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**Author:** ![andrew-r-lukasik](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/andrew-r-lukasik/32/780005_2.png) [@andrew-r-lukasik](https://forums.unrealengine.com/u/andrew-r-lukasik)\
**Post date:** [August 26, 2019, 8:38pm UTC](https://forums.unrealengine.com/t/optimisation-gpu-visualizer-help/436034/3 "2019-08-26T20:38:42Z")

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You’re CPU-bound. Rendering takes 5ms on GPU but then it waits \>30ms for CPU to complete the frame. Profile CPU instead.