Hey!

I guess there are lots of things which can affect function times slower. But for me the biggest slowdown was using while loops for each entity (npc, items, objects, etc). How many while loops do you have in your game running at once? As a workaround, I would suggest to stop using while loops for main game logic at all. Instead, I would suggest using 'ENABLE_FRAME' for decor objects and on_frame for main game loop. I got this from one of the Superku's posts around the forum, this will help you with structuring function execution, as well will help to avoid using 'wait' (it sucks and can cause lots of troubles) and also will help to avoid using lots of while loops. If you need more examples, take a look at the source code of my Retro-FPS which is published on forum and can be downloaded from my github.

Greets.