JavaScript is hardly cache friendly. As for Go, that's a language which doubles up the size of every pointer and doesn't even use a moving GC, and last time I

JavaScript is hardly cache friendly. As for Go, that's a language which doubles up the size of every pointer and doesn't even use a moving GC, and last time I looked, the quality of machine code it generated was atrocious. It's not really cache/hardware friendly to do those things. Value types are I suspect being over-estimated here: when Java gets them I am expecting disappointment when they don't magically make everything twice as fast.