⚡ Extra Performance

For extra performance you can install GraalVM & set a few flags

☕ GraalVM Java Runtime

  1. Download from this link
  2. Create a folder under C: named FastestJavaAlive
  3. Extract the downloaded zip file under C:/FastestJavaAlive
  4. Check if under the C:/FastestJavaAlive, you have a folder named graalvm-jdk-17...
  5. Open the folder, and go into bin, find the file named javaw, right click and click on "Copy as Path"
  6. Remove the quotes at the beginning and the end of the pasted text.
  7. In Prism Launcher from the top bar, open Settings, navigate to Java and paste in the Java path field
  8. Close the window and you are ready to go.

🏁 JVM Flags

These are designed to work with ☕GraalVM. Do not use them if you don't use ☕GraalVM

  1. In Prism Launcher from the top bar, open Settings, navigate to Java
  2. In the JVM arguments field, paste the following:
-XX:+UnlockExperimentalVMOptions -XX:+UseJVMCICompiler -XX:+UnlockDiagnosticVMOptions -Dterminal.jline=false -Dterminal.ansi=true -Djline.terminal=jline.UnsupportedTerminal -Dlog4j2.formatMsgNoLookups=true -XX:+AlwaysActAsServerClassMachine -XX:+AlwaysPreTouch -XX:+DisableExplicitGC -XX:+UseNUMA -XX:AllocatePrefetchStyle=3 -XX:NmethodSweepActivity=1 -XX:ReservedCodeCacheSize=400M -XX:NonNMethodCodeHeapSize=12M -XX:ProfiledCodeHeapSize=194M -XX:NonProfiledCodeHeapSize=194M -XX:+PerfDisableSharedMem -XX:+UseFastUnorderedTimeStamps -XX:+UseCriticalJavaThreadPriority -XX:+EagerJVMCI -Dgraal.TuneInlinerExploration=1 -Dgraal.CompilerConfiguration=enterprise -XX:+UseG1GC -XX:+ParallelRefProcEnabled -XX:MaxGCPauseMillis=200 -XX:+UnlockExperimentalVMOptions -XX:+UnlockDiagnosticVMOptions -XX:+DisableExplicitGC -XX:+AlwaysPreTouch -XX:G1NewSizePercent=30 -XX:G1MaxNewSizePercent=40 -XX:G1HeapRegionSize=16M -XX:G1ReservePercent=20 -XX:G1HeapWastePercent=5 -XX:G1MixedGCCountTarget=4 -XX:InitiatingHeapOccupancyPercent=15 -XX:G1MixedGCLiveThresholdPercent=90 -XX:G1RSetUpdatingPauseTimePercent=5 -XX:SurvivorRatio=32 -XX:+PerfDisableSharedMem -XX:MaxTenuringThreshold=1 -XX:+UseStringDeduplication -XX:+UseFastUnorderedTimeStamps -XX:+UseAES -XX:+UseAESIntrinsics -XX:+UseFMA -XX:+UseLoopPredicate -XX:+RangeCheckElimination -XX:+EliminateLocks -XX:+DoEscapeAnalysis -XX:+UseCodeCacheFlushing -XX:+SegmentedCodeCache -XX:+UseFastJNIAccessors -XX:+OptimizeStringConcat -XX:+UseCompressedOops -XX:+UseThreadPriorities -XX:+OmitStackTraceInFastThrow -XX:+TrustFinalNonStaticFields -XX:ThreadPriorityPolicy=1 -XX:+UseInlineCaches -XX:+RewriteBytecodes -XX:+RewriteFrequentPairs -XX:+UseNUMA -XX:-DontCompileHugeMethods -XX:+UseFPUForSpilling -XX:+UseVectorCmov -XX:+UseXMMForArrayCopy -XX:+UseLargePages -Dfile.encoding=UTF-8 -Xlog:async -Djava.security.egd=file:/dev/urandom --add-modules jdk.incubator.vector
  1. Close the window and you are ready to go.
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