I have put together a group of mods that I'm messing around with using forge. After a few minutes a spike of lag appears and lasts for a few seconds and the game continues normally until the next lag spike. So far I don't see any specific time or place this occurs. I have about 8 gigs of ram allocated to Minecraft, when the spike occurs the usage jumps up from 20% to 99% . Minecraft is being run on 1.7.10. My question is there a way to tell what mod is causing this issue without having to go through each mod and testing it?
You should just take out one mod at a time and go on a test world and see if that does anything(EX: Remove (Lets just say orespawn) play around for a bit if there is no lag take note that orespawn was the cause if there is lag take note that orespawn is ok)