When I create worlds for the first 30 seconds or so my CPU usage spikes to 100 percent. This is causing extremely high temperatures on my CPU, even reaching 90 degrees celsius. It usually goes away after about 30 seconds to a minute. 

I have tried lowering graphics settings but this has no effect. Whenever I make a new world the CPU spikes to 100 percent usage. 

I have a i7 8700K, 1080ti and 64 GB of ram. Do I need to reinstall minecraft, or is this a known thing that usually happens? No other games I have push my cpu to 100 percent usage. 

Please Help.