I believe Java (OpenJDK at least) is slow to start even if you disable the JIT and go with pure interpretation, and even if you disable runtime bytecode verific

I believe Java (OpenJDK at least) is slow to start even if you disable the JIT and go with pure interpretation, and even if you disable runtime bytecode verification. It's just generally heavyweight and slow to get off the ground. I imagine JIT compilation should help with this, as you suggest.