Is your feature request related to a problem? Please describe.
Allow chunks to be loaded slowly remove lag spikes

Describe the solution you'd like
Have a option that says Lazy Chunk Loading: with modes such as: very slow, slow, medium, fast, very fast. Whatever option selected will determine how slow chunks load

Describe alternatives you've considered
Have a bar that says 1-5 to show how fast chunks load

Additional context
It's like the optifine feature in video settings > other

This is more or less an issue that stems from #691. Right now, we don't provide any way to limit the amount of time being spent on chunk uploads, and instead just try to keep the thread pool as busy as possible without overloading it.

I can certainly see the appeal of both allowing the user to limit the number of threads used for chunk building (as to prevent CPU overload, we shouldn't be scheduling so many threads anyways) and the amount of time we spend per-frame trying to submit task builds (to keep frame times more stable).