I have already benchmarked the plugin for a long time and it's coded with performance in mind.
If you have performance issues generate a timings report and a spark report of the server (after 30-40 minutes of running, not on start), and report it on my Github.
https://github.com/PluginBugs/Issues-CinematicStudio/issues
I cannot fix issues if they are not reported.
If you already reported it and provided the timings and spark I will check it as soon as possible.