I confirm that ZGC works with IntelliJ IDEA, and it seems to me that it makes IDEA respond quite a bit faster. It's not hard to get IntelliJ IDEs to use ZGC by

I confirm that ZGC works with IntelliJ IDEA, and it seems to me that it makes IDEA respond quite a bit faster. It's not hard to get IntelliJ IDEs to use ZGC by editing the VM properties file.