useGlobalBiomeCache usage

[saintsareprey]

I was just looking around the newest release (0.2.0+alpha.5 atm), and about this:

useGlobalBiomeCache is still turned off by default. It is planned to be enabled by default in future versions in 1.17

I am a noob in coding/programming/nerd stuff (yet), but I assume this is like a shadercache for performance, memory related or something like that? Anyway, if this is performance-related, i'd like to know if it's safe to enable it, and what consequences would that be? I'm assuming it might be dangerous or not advised to, since it's off by default, i'm really curious tho.

btw sry if i'm posting this in the wrong section.

[duplexsystem]

We keep global biome cache off by default because it greatly increases memory usage