Don't think so. I have allocated 5 GB of memory (out of 8 in total) via the launcher. So I don't think that's the case
No, i mean while im mining the block i change the tool in my hand (WITHOUT TO GET MY HAND OFF THE LEFT BUTTON OF MY MOUSE!)
No im sorry but when you changed tool while mining in other versions it should continue the process without starting from 0
Don't think so. I have allocated 5 GB of memory (out of 8 in total) via the launcher. So I don't think that's the case