Change the Arduino compiler output folder to /dev/shm.

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  1. Close the Arduino IDE. (Otherwise your edits will be overwritten)
  2. Open preferences.txt. (Found in the folder ~/.arduino15 on Linux Mint)
  3. Add a new value build.path that points to your preferred folder:
    build.path=/dev/shm/Arduino
  4. Save preferences.txt.
  5. Restart the IDE. Compiler output is now saved in the folder you just added.
    Remember that dev/shm is gone after a reboot!