How to increase the editor memory on startup: Loading tilemaps causes the editor to become sluggish

Questions
#1

Hello all , as i know that the editor is eclipse framework , how do i increase the memory on startup
As i feel like he have hard time on loading images and sometimes it get sluggish
image

Thanks

#2

It used to be many many years ago. Now it’s built using JavaFX. You can configure the amount of memory like this:

#3

Adding -Xmx6gb (same for 2,3,4,5) as described in the manual, using Defold 1.6.2 on Ubuntu (64bit 22.04.3 LTS) I get:
Invalid maximum heap size: -Xmx6gb
Error: Could not create the Java Virtual Machine.
Error: A fatal exception has occurred. Program will exit.

I have not changed any other settings and without this line Defold works as usual (I have a lot of RAM:-).

If I do -Xmx1024m, I get the error:
Error: Could not find or load main class -Dfile.encoding=UTF-8
Caused by: java.lang.ClassNotFoundException: -Dfile.encoding=UTF-8