Not not at all. I have the proof of this in these screen shots.
First off a server is different from a client.
Unless you mean the actual sever for the client thats different for single player.
But if you add a actual "server" then it becomes different look.
Ok first pic on the bottom the 238,028k thats just ftb window no single player running. When I opened single player then the top number appeared. The 1,867,67...
Ok so in this pic this is what happened when I have ftb window aka single player server working and single player running. And my private server running.
Its weird when I run the actual server cause its process is a lot lower in consumption. it is 560,020
Anyways we may just have a miss understanding though.
But I did those in this exact order.
1 opened FTB
2 Ran infinity
3 turned private server on.
I watched how those processes came up when I did all that.
Anyways thats good you been good. I been playing a lot of D3 again and climbing leaders boards. I come here from time to time and see whats up miss ya guys.