Lunar Client Post-Badlion Acquisition: New Performance Features & Settings

Everything you need to know about Lunar Client Post-Badlion Acquisition: New Performance Features & Settings, covering key takeaways.

The most widespread misconception among competitive players is that assigning maximum system memory yields peak framerates. Minecraft handles memory allocation through Java’s generational garbage collection. If you feed the client 8 GB to 16 GB of memory, the collector engine sleeps until memory fills up, then halts the entire game thread to sweep gigabytes of data. This dynamic results in sharp micro-stutters during critical combat encounters.

Optimal allocated RAM settings depend strictly on your target game version and resource pack depth:

• Minecraft 1.8.9 (Standard PvP / Hypixel): Allocate exactly 3072 MB (3 GB) or 4096 MB (4 GB). Exceeding 4 GB offers zero performance gain and directly destabilizes frametime consistency.
• Minecraft 1.20+ (Modern Survival / SMP): Allocate between 4096 MB (4 GB) and 6144 MB (6 GB) to accommodate heavier terrain generation protocols.

Open the Lunar Client launcher, enter Settings > Set Allocated Memory, and drag the slider to 3.5 GB. Under the advanced JVM arguments field, replace outdated string commands with modern Shenandoah or G1 garbage collector flags tailored to reduce pause times below 2 milliseconds:

-XX:+UseG1GC -XX:+ParallelRefProcEnabled -XX:MaxGCPauseMillis=20 -XX:+UnlockExperimentalVMOptions -XX:+DisableExplicitGC -XX:G1NewSizePercent=20 -XX:G1ReservePercent=15 -XX:G1MinWastePercent=5 -XX:G1MixedGCCountTarget=4