Chunk Pre-Genning

Hey guys,
I kind of needed some help with the way chunk pre-genning is working right now. I am currently using Project Borders to access the pre-gen feature, but there seems to be a few snags. The pre-genning was working fine with loading 10-15 chunks in .010ms, but now it’s gone down to only loading 2-4 chunks in 0.016ms. I’m not sure what the cause of this would be as the server doesn’t seem to be lagging, or didn’t seem to be lagging when it was doing the 10-15. I would just like some insight on how the sponge chunk pre-genning system works.

Thanks,
Nova