[twic]

The one significant thing i can think of is that Go makes pointers explicit, and allows variables and parameters which are by-value. So you can control whether some struct contains a pointer to some other struct, or just embeds the fields directly. This gives you influence over memory use patterns, access time, and garbage collection that you don't have in Java.

Java is planned to gain an equivalent of this ability through primitive classes (JEP 401). As as i know, we expect to get a preview of this feature in Java 19, which should be released in September this year.