There are GC paradigms that do compaction and do not stop the world (https://www.azul.com/products/zing/ https://www.azul.com/products/zing/). They are expensi

There are GC paradigms that do compaction and do not stop the world (https://www.azul.com/products/zing/ https://www.azul.com/products/zing/). They are expensive in other dimensions though (actual cash). Again, not disagree-ing with the choices the golang team are making on GC, they work great for my workloads but they aren't without trade off for other kinds of workflows.