[Python-ideas] Bytecode JIT

[Soni L.]

On 2017-07-01 07:34 PM, Victor Stinner wrote:
> Let's say that you have a function "def mysum (x; y): return x+y", do 
> you always want to use your new IADD instruction here? What if I call 
> mysum ("a", "b")?
>
> Victor

Let's say that you do. Given how short it is, it would just get inlined. 
Your call of mysum ("a", "b") would indeed not use IADD, nor would it be 
a call. It would potentially not invoke any operators, but instead get 
replaced with "ab".

When you have a tracing JIT, you can do away with a lot of overhead. You 
can inline functions, variables, do away with typechecks, and many other 
things. This holds true even if that JIT never emits a single byte of 
machine code.