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Useful starting args

Wazubaba has found a random and arcane series of launch arguments that seem to help Minecraft run better.

You can edit your launch args in MultiMC or figure it out manually.

-XX:+DisableExplicitGC -XX:+UseConcMarkSweepGC -XX:+UseParNewGC -XX:+UseNUMA -XX:+CMSParallelRemarkEnabled -XX:MaxTenuringThreshold=15 -XX:MaxGCPauseMillis=30 -XX:GCPauseIntervalMillis=150 -XX:+UseAdaptiveGCBoundary -XX:-UseGCOverheadLimit -XX:+UseBiasedLocking -XX:SurvivorRatio=8 -XX:TargetSurvivorRatio=90 -XX:MaxTenuringThreshold=15 -Dfml.ignorePatchDiscrepancies=true -Dfml.ignoreInvalidMinecraftCertificates=true -XX:+UseFastAccessorMethods -XX:+UseCompressedOops -XX:+OptimizeStringConcat -XX:+AggressiveOpts -XX:ReservedCodeCacheSize=2048m -XX:+UseCodeCacheFlushing -XX:SoftRefLRUPolicyMSPerMB=10000 -XX:ParallelGCThreads=10

Enable vanilla recipe book

You are going to need to make a local config edit to do this, but it is fairly easy. Firstly, you need to get to your Minecraft configs directory.


  1. Right-click your instance in MultiMC, click Edit Instance.
  2. Switch to the Loader mods page.
  3. Click the View Configs button.


For this you are going to have to look elsewhere.

Once you get to the config folder the rest is easy:

  1. Open up the file fastbench.cfg in a text editor.
  2. Find the line that says B:"Disable Recipe Book"=true.
  3. Switch true to false.
  4. Save the file and you are now done. You should have your crafting book back.