[Updated 2025] JetBrains Custom VM Options Configuration Optimized For High Performance... Works with all JetBrains IDEs... JDK 8.x+ Recommended....

Webstorm64.vmoptions

# Make sure to modify "-Xms", "Xmx", "CICompilerCount", and "ParallelGCThreads" according to your PC hardware configuration...

# -------------------------------------------
# Memory Settings (High-Memory Workstation)
# -------------------------------------------

# Set the initial heap size (this reduces resizing overhead)
-Xms2048m

# Set the maximum heap size (adjust depending on your system; 2048m or 4096m is good for modern machines)
-Xmx4096m

# Set the reserved code cache size for JIT-compiled code (256m or 512m if you use many plugins)
-XX:ReservedCodeCacheSize=512m

# Adjust the maximum metaspace size (useful if you're running many plugins)
-XX:MaxMetaspaceSize=512m

# Young to Old Gen ratio — 33% young gen, 67% old gen (ideal for IDEs)
-XX:NewRatio=2

# Set initial and max size of the Young Generation
-XX:NewSize=1024m
-XX:MaxNewSize=1536m



# ----------------------------------------------------
# JIT Compiler Settings (Optimized For High-End CPUS)
# ----------------------------------------------------

# Use the HotSpot Server VM for maximum performance
-server

# Increase compiler threads (faster warm-up and compilation)
-XX:CICompilerCount=8

# Enable Tiered Compilation (starts with interpreter, then switches to compiled mode)
-XX:+TieredCompilation



# -------------------------------------------
# Garbage Collection Tuning
# -------------------------------------------

# Enable parallel garbage collector for better performance on multi-core CPUs
-XX:+UseParallelGC

# Use up to 8 threads for parallel garbage collection
-XX:ParallelGCThreads=4

# Enable memory page pre-touching (faster memory access, reduces GC latency)
-XX:+AlwaysPreTouch

# Enable string deduplication (reduces heap usage)
-XX:+UseStringDeduplication

# Enable escape analysis (allocates more objects on stack vs heap)
-XX:+DoEscapeAnalysis



# --------------------------------------------------
# Soft Reference Policy (Tweak Cache Eviction Rate)
# --------------------------------------------------

# Longer lifespan of SoftReferences (better IDE caching behavior)
# For modern machines (16GB+ RAM), you can safely increase this to set it to `500` or even `1000`
-XX:SoftRefLRUPolicyMSPerMB=500



# -------------------------------------------
# Jvm Behavior & Startup Tuning
# -------------------------------------------

# Skip class verification (faster startup, safe for production apps)
-Xverify:none

# Increase stack size per thread (safe buffer for plugin-heavy IDEs)
-Xss2m

# Use compressed pointers to save memory (enabled by default, safe to specify)
-XX:+UseCompressedOops
-XX:+UseCompressedClassPointers

# Disable heap dump creation on OutOfMemoryError (avoid large .hprof files)
-XX:-HeapDumpOnOutOfMemoryError

# Prefer IPv4 over IPv6 for network connections (better compatibility)
-Djava.net.preferIPv4Stack=true



# -------------------------------------------
# File Encoding (Avoid Encoding Issues)
# -------------------------------------------

# Set the file encoding to UTF-8 to avoid character issues
-Dfile.encoding=UTF-8



# -------------------------------------------
# Control Auto-Updates
# -------------------------------------------

# Enable the following option if you want to disable updates or updates are managed by ToolBox
#-Dide.no.platform.update=true



# --------------------------------------------
# Logging (Optional, Helpful For Diagnostics)
# --------------------------------------------

# Enable GC logging (optional - remove if unnecessary)
#-XX:+PrintGCDetails
#-XX:+PrintGCTimeStamps
#-Xloggc:$USER_HOME\logs\webstorm\webstorm-gc.log

Updated based on the awesome article by @ScriptedAlchemy

I’ll update my JetBrains repo or feel free to send pr if you see any adjustments needed

Sure, I'm just experimenting the settings performance impact

@ScriptedAlchemy are you still maintaining your jetbrains repo?

With the new 2024 updates I'm getting so many IDE freeze/lag issues

Send a PR if u have updates. I know the jetbrains guys so I'll ask them for advise on a 2024 update