# Playing events micro-freezes the CPU

**URL:** <https://qa.fmod.com/t/playing-events-micro-freezes-the-cpu/19621>\
**Category:** FMOD Studio\
**Tags:** csharp\
**Created:** [December 6, 2022, 1:33pm UTC](https://qa.fmod.com/t/playing-events-micro-freezes-the-cpu/19621 "2022-12-06T13:33:36Z")\
**Posts on this page:** 1\
**Showing post:** 2

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**Author:** ![mrhelmut](https://avatars.discourse-cdn.com/v4/letter/m/35a633/32.png) [@mrhelmut](https://qa.fmod.com/u/mrhelmut)\
**Post date:** [December 7, 2022, 10:43am UTC](https://qa.fmod.com/t/playing-events-micro-freezes-the-cpu/19621/2 "2022-12-07T10:43:39Z")

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It is related to using [convolution reverb](https://qa.fmod.com/t/strange-cpu-spikes-from-convolution-reverb/14862).

We understand that convolutions are more expensive (we’ll be using normal reverb), though it seems peculiar that performances are fine whenever there’s an existing instance in the pool (it seems to only happen when the pool is empty). Here’s some profiling data.

![profiling](https://canada1.discourse-cdn.com/flex036/uploads/fmod/original/2X/c/c171311130a5e28ef54180525824b3ee29aa430e.png)

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