Minecraft – Lag In Singleplayer

Try Getting the OPtifine mod it adds more options and speeds up your game i have a friend who has terrible internt and when he got this mod his minecraft sped up quite a bit. It is even legal to have on servers.

Found a thread on the FTB forum, and while some of the info may be contradictory or misinformation, i did see they were using a special startup config. While I am not entirely postive of what this does....what I can (hopefully) deduce from it is that it is enabling the FTB server to use SS4 cpu instructions and modifying how garbage collection is ran. After running the server with this config, within minutes the "tick lag" on the server disappeared, everything moved very smoothly.... and best of all, CPU usage went from 70% to 14% even with several chunk loaders and a quarry.

Thread found: http://forum.feed-the-beast.com/threads/how-to-make-an-efficient-server.5525/

Startup config used:

"C:\Program Files\Java\jre7\bin\java" -server -Xincgc -Xmx3072M -Xms1024M -Xmn512M -XX:NewRatio=2 -XX:CMSFullGCsBeforeCompaction=1 -XX:SoftRefLRUPolicyMSPerMB=2048 -XX:+CMSParallelRemarkEnabled -XX:+UseParNewGC -XX:+UseAdaptiveSizePolicy -XX:+DisableExplicitGC -Xnoclassgc -oss4M -ss4M -XX:+UseFastAccessorMethods -XX:CMSInitiatingOccupancyFraction=90 -XX:+UseConcMarkSweepGC -XX:UseSSE=4 -XX:+UseCMSCompactAtFullCollection -XX:ParallelGCThreads=4 -XX:+AggressiveOpts -cp "ftbserver.jar" -jar "ftbserver.jar"