How do my FPS values get better [Minecraft]?

I've been playing Minecraft Java for a few weeks now and actually had a constant 170 FPS. However, I opened Minecraft today (everything is normal like the last few times) and only had between 30 and 50 FPS, with which you can't play properly. If I go round, I only have 5 FPS when joining. Does anyone have a recommendation what could help? (Graphics settings are already screwed down and I also use Optifine.)

Thanks in advance to those who give serious answers.

Make out all the particle effects, assign more RAM to your Minecraft version, regularly empty your% temp% folder.

Thanks I make sure that particle effects are already over

Wonderful.

Maybe there was still an open program that pulls ram?

Maybe there was something open in the background so far but I haven't seen anything.

Right click on the taskbar -

and then to the task manager.

You can have a look there

Download the badlion client, it does more fps

Is your graphics card still assigned to Java?

Thanks anyway from the start

Sorry I don't know about something like that what is "Graka"?

Graphic card. Nvidia system settings> Program settings> Java / Javaw. The Nvidia high-performance processor must be selected there. Otherwise it automatically uses the integrated graphics chip in the processor, to which your described values of 30-50 FPS would fit. I would be happy about a star if it helped.