Here you need to check what's happening in your application.
Open the profiler (Window / Profiler) to understand what is happening.

There can be many possible problems:
- Perhaps you use a lot of markers. I've seen applications that use a thousand and million markers.
- Perhaps a third-party script creates problems.
- Perhaps you have your own vision of "reasonable resolution".
The only way to increase performance is through testing.

You can do it yourself, or send your project to us (support@infinity-code.com).
We will check this and give you some tips on how to increase performance.

I use tileset at a reasonable resolution but I was hoping others had improvements to recommend

Thanks