Could you help me figure out please what is causing my site to hit CPU limits?

Depending on how you implement your logic you could either have a light weight app or a really heavy one. And according to how you described it, I’m afraid that you have used a rather resource extensive way. bluepencil: > it should be using local cpu and only hits to save rolls to a txt file I don’t know what’s your logic here because “it uses local CPU” and “save rolls to a txt file” shouldn’t come hand in hand with each other. Saving data to a text file consumes server CPU. Loading data from it also costs CPU. And if you do this very frequently, you’ll hit the CPU limit. bluepencil: > share the same session Judging from the outcome you seem to be just polling from the server, which means “do this very frequently”. And it hits the limit very quickly.