GC is only part of the issue. Value types allow much finer control over locality, something completely lacking in Java now. And without that, you give up a lot

GC is only part of the issue. Value types allow much finer control over locality, something completely lacking in Java now. And without that, you give up a lot of performance. For example: https://rcoh.me/posts/cache-oblivious-datastructures/ https://rcoh.me/posts/cache-oblivious-datastructures/