Install a minimal Eclipse for ABAP that uses Java 11 on Windows

You will get the best performance out of Eclipse with ABAP by using a minimal installation without the Java IDE running on the latest Java version.

Install Java 11

e.g. the commercial one from Oracle or the free version https://adoptopenjdk.net/
Check the latest available Hana Tools version → currently 2018-12
https://tools.hana.ondemand.com/

Get minimal Eclipse

Eclipse versioning is a little bit confusing, currently release 2018-12 equals version 4.10. Got it?
Go to
https://download.eclipse.org/eclipse/downloads/
and download the Platform Runtime Binary for the release supported by Hana Tools. This installation is without Java IDE and therefore more slim and lower in resourcees.

Install ABAP tools

When eclipse is started, go to
Help → install new Software → Add, then sćhoose a name and add the link from the Hana Tools page
https://tools.hana.ondemand.com/2018-12

Change eclipse.ini

You might have multiple Java installations on your machine. In case Eclipse does not use the latest Java, which is in our case Java 11, we need to change the eclipse.ini file in the Eclipse folder. In the frist line add the -vm, in the second line goes the path to the Java executable.
-vm
C:/Program Files/Java/jdk-11/bin/javaw.exe

If you have a jvm.dll in the server folder, use this one. It will give you better Windows task bar integration with a work add to favorites.
-vm
C:/Program Files/Java/jdk-11/bin/server/jvm.dll