Java release cycle is ~3yrs so Java 10 will be roughly expected in 2020/21 time frame. And at that point larger ecosystem like Apache etc will start taking adva

Java release cycle is ~3yrs so Java 10 will be roughly expected in 2020/21 time frame. And at that point larger ecosystem like Apache etc will start taking advantage of value type. So it is like 6-8 years from now which I would not characterize as very temporary. Also this is assuming Go committer from now onwards just sit and do nothing about performance improvements which again seems quite unlikely. Java has 15 year head start on Go and if a newer Go GC beats very mature hotspot GC it could either mean Hotspot advantage is largely in theory or it has reached its peak performance and there is not much scope to improve further.