# UI performances of a 3rd party VST hosted inside a JUCE VST **URL:** \ **Category:** Audio Plugins\ **Created:** [March 6, 2019, 11:15am UTC](https://forum.juce.com/t/ui-performances-of-a-3rd-party-vst-hosted-inside-a-juce-vst/32128 "2019-03-06T11:15:42Z")\ **Posts on this page:** 1\ **Showing post:** 3
**Author:** ![OBO](https://avatars.discourse-cdn.com/v4/letter/o/ba8739/32.png) [@OBO](https://forum.juce.com/u/OBO)\ **Post date:** [March 8, 2019, 9:06am UTC](https://forum.juce.com/t/ui-performances-of-a-3rd-party-vst-hosted-inside-a-juce-vst/32128/3 "2019-03-08T09:06:55Z")
Possibly the same issue as this? Should be a high priority for the JUCE team, imo. > [@Performance issue with OpenGL in multiple windows](https://forum.juce.com/t/performance-issue-with-opengl-in-multiple-windows/23451): > > This is currently on Mac, in a standalone application, but I think the problem probably applies to all platforms. (It is also on JUCE 4.3 – sorry; if this has been resolved in more recent versions, that would be a solution as well). I have found that using an OpenGLContext attached to the top level component of the window improves CPU usage substantially in my app. I am not using any OpenGL calls directly, I am just using it to accelerate JUCE’s 2d Drawing. If I create multiple windows, and ea… --- _[View the full topic](https://forum.juce.com/t/ui-performances-of-a-3rd-party-vst-hosted-inside-a-juce-vst/32128)._