whtout23 wrote I see you're playing on a laptop I had a similar situation a while back and it turned out to be that the processor was overheating and causing a massive performance drop. I would suggest trying a laptop cooler and see if that helps at all.

I've got "CoreTemp" running on my computer and i did notice a few spikes in temperature, but overall the temp normally stays around 20-30c.

I have a USB Stand with extra fans on it to cool the laptop, i'll try that out and see if there's any significant cpu difference.