# Horrible performance on mobile

**URL:** <https://qa.fmod.com/t/horrible-performance-on-mobile/12635>\
**Category:** Unreal Engine\
**Created:** [August 7, 2016, 3:27pm UTC](https://qa.fmod.com/t/horrible-performance-on-mobile/12635 "2016-08-07T15:27:31Z")\
**Posts on this page:** 4\
**Page:** 1

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**Author:** ![gameDNAstudio](https://avatars.discourse-cdn.com/v4/letter/g/9e8a1a/32.png) [@gameDNAstudio](https://qa.fmod.com/u/gameDNAstudio)\
**Post date:** [August 7, 2016, 3:27pm UTC](https://qa.fmod.com/t/horrible-performance-on-mobile/12635/1 "2016-08-07T15:27:31Z")

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I noticed horrible performance on mobile: both Android and iOS.

Without any playing events, FMOD takes 7-10% CPU! With 5 events at the same time it increases to 25-30% CPU time…

Tested devices: iPhone 6 and NVIDIA Shield Tablet K1

This is unnaceptable and if it won’t be fixed I should consider move to Wwise ☹

Profiler: [http://oi63.tinypic.com/2wpv2mb.jpg](http://oi63.tinypic.com/2wpv2mb.jpg)

![enter image description here](http://oi63.tinypic.com/2wpv2mb.jpg)

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**Author:** ![r618](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/r618/32/36_2.png) [@r618](https://qa.fmod.com/u/r618)\
**Post date:** [August 7, 2016, 3:51pm UTC](https://qa.fmod.com/t/horrible-performance-on-mobile/12635/2 "2016-08-07T15:51:22Z")

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What cpu usage are you seeing in the Xcode profiler alone i.e. without fmod studio attached ?  
( if that’s what you are doing - can’t say since i’ve never used fmod studio profiler )

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<div class="post-metadata">

**Author:** ![gameDNAstudio](https://avatars.discourse-cdn.com/v4/letter/g/9e8a1a/32.png) [@gameDNAstudio](https://qa.fmod.com/u/gameDNAstudio)\
**Post date:** [August 7, 2016, 5:02pm UTC](https://qa.fmod.com/t/horrible-performance-on-mobile/12635/3 "2016-08-07T17:02:32Z")

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I tried also Xcode Profiler, Tegra Profiler and UE4 profiler. Everywhere it reports similar CPU usage…

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**Author:** ![brett](https://yyz2.discourse-cdn.com/flex036/user_avatar/qa.fmod.com/brett/32/261_2.png) [@brett](https://qa.fmod.com/u/brett)\
**Post date:** [August 8, 2016, 12:22am UTC](https://qa.fmod.com/t/horrible-performance-on-mobile/12635/4 "2016-08-08T00:22:40Z")

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Its quite possible the CPU has lowered itself into a very low CPU speed as not much else is happening, this is not an FMOD specific issue. If you can put it into a developer mode where the cpu is running at full capacity you will notice this is not going to be anywhere near this high.

Please refer here for more information [http://www.fmod.org/documentation/#content/generated/platform\_ios/performance\_reference.html](http://www.fmod.org/documentation/#content/generated/platform_ios/performance_reference.html)

The FMOD mixer can mix 32 voices in as little as 1.1% on a 5S, which is a generation behind the 6.