Okay so I loved Multimine 1.7.10 it was perfect with 1.12.2 it keeps causing lag spikes even if I just stand still ... I don't have a crashlog because its not crashing and I am not going to die if you don't fix it but its just something I wanted to bring to your attention @AtomicStryker

"It" causes lag spikes? That isn't enough information to go on. Just loading the mod does that? Do you have to partialbreak some blocks for it to happen? Does it stop once there are no partial broken blocks?

It just has to be in the modpack. I am sure its due to the way recent forge versions changed the way ticks are handled. I will actually investigate more after I get further along in my modpack.

I doubt very much it is Multi Mine. The server side interaction of the mod with the world is very limited in scope, and there are no complex calculations being made. There is a hard limit on affected blocks, too. If you do manage to reproduce a Multi Mine issue, you may reopen this.

Will do.

I ran into the same and got some more info:
#291