Hello,

My website is very slow, and I was wondering if someone knows of the plugin Performance Boost for K2? And if everyone is using it with the latest version?

Or are there any other perfomance enhancing solutions available?

Hello,

I would not use an extension, apart from caching.
In most scenarios, 90% of any performance issues are server related if your site has been set up correctly.
A properly set up environment and / or a CDN will do wonders.