Eventhandlers & performance on mobile

I have added eventhandlers to a function that takes about half the time of each frametime normally, but the script runs at 30 FPS normally. When i attach one of the handlers i get around 2 fps, and when i attach both, the script time increases to 1.6 seconds. Does anybody have performance issues related to events on mobile too? There's probably a way around by not using event handlers, but for my application events would have worked better. I did connect the profiler to the application, but could not find the handlers for the events back there.