LESS Performance Implications

I have recently began looking at less and it all looks pretty neat. However, with that said what are the performance implications. I mean… since it is dependent on JavaScript I would think there are some major performance implications when using it or am I wrong. So any discussion regarding performance issues related to LESS would be great.

thanks

Compiler written in php looks promising. Anyone used this?

lessphp - leaner css in php

No sorry, never had the need to use any of those but I’d be interested in hearing anyone’s results or comments also.