alt Hacker NewsOptimal in what sense? In the java shops I've worked at it's usually viewed as a pretty optimal situation to have everything in one language. This makes code reuse, packaging, deployment, etc much simpler.
In terms of speed, memory usage, runtime characteristics... sure there are better options. But if java is good enough, or can be made good enough by writing the code correctly, why add another toolchain?
> But if java is good enough, or can be made good enough by writing the code correctly,
"writing code correctly" here means stripping 95% of lang capabilities, and writing in some other language which looks like C without structs (because they will be heap allocated with cross thread synchronization and GC overhead) and standard lib.
Its good enough for some tiny algo, but not good enough for anything serious.