How To Add Google AdSense To Your Website
    How To Download Canvas as an image
    How To Embed Youtube Videos
    How To Host NodeJS Apps
    How To Host Static Websites On Amazon AWS EC2
    How To Host Static Websites On Amazon AWS S3
    How To Host Static Websites On GCP Cloud Storage
    How To Install Node.js
    How to Speed Up IntelliJ IDEA / Clion
    How to safely store API Keys

How to Speed Up IntelliJ IDEA / Clion

Updated: 2022-08-06

Disable all unnecessary plugins

To disable plugins, open menu File > Settings > Plugins. Safe candidates for disabling are version control plugins (CVS, Git, Mercurial, Perforce, Subversion, TFS) that you don't use.

Edit VM Options

Click Help > Edit Custom VM Options…

Or activate the action menu with Control + Shift + A. Type vmoptions and select Edit Custom VM Options

(Clion VM Options are stored in ~/.Clion*/config/clion64.vmoptions)

Note: Don't edit .vmoptions and .properties files directly on macOS, as it will violate the application signature.

Set Memory


Why 31 GB but not larger: because anything larger disables pointer compression optimization, pointer-heavy applications effectively have less usable memory.

Read more:

To check your memory:

$ lshw -class memory

Try a new Java garbage collector

Use G1:


Use ShenandoahGC:


Remember to delete the line that uses the concurrent marksweep GC

Put ephemeral files in tmpfs (RAM)

Activate the action menu with Control + Shift + A Type edit custom properties and select Edit Custom Properties

Or create or edit ~/.CLion*/config/ and set idea.system.path to any writable tmpfs, e.g. /dev/shm:



  • you need to completely reindex every time you restart the IDE
  • your logs are also in memory, so if you have other issues they'll be harder to diagnose

To create a ramdisk:

$ mkdir -p /mnt/ram
$ mount -t tmpfs tmpfs /mnt/ram -o size=8192M

Use an SSD

If you can change your hardware. This is the most effective way to speed up the IDE.

To check

$ lsblk -d -o name,rota
nvme0n1    0

If the ROTA column shows 1, you don't have an SSD