How is this a JIT? Everything is compiled to machine code. There's no advanced t...

yxhuvud · on Nov 4, 2020

> It might as well be an in-memory, lazy

Yeah, that is a jit. Perhaps not a very fancy one, the same way ARC is a very unfancy GC, but it is still a jit.

chrisseaton · on Nov 4, 2020

> Everything is compiled to machine code.

Yes... but it does that just-in-time, which is what JIT stands for.

> There's no advanced type specialization or lazy deoptimization.

I don't think those things are required for it to be a JIT are they? I'd say it's a static JIT, rather than a dynamic, profiling, and specialising JIT, but both are JITs.

> It might as well be an in-memory, lazy, AOT compiler.

Well yeah... that describes a JIT.

rurban · on Nov 4, 2020

A simple method jit is also a good jit, even without escape analysis and advanced optimizations. It avoids the op branching and enables code caching.