> At the moment, the JIT is only used if the function contains the JUMP_BACKWARD opcode which is used in the while statement but that will change in the future.

> At the moment, the JIT is only used if the function contains the JUMP_BACKWARD opcode which is used in the while statement but that will change in the future. Isn't this the main reason why it's only a 2-9% improvement? Not much Python code uses the while statement in my experience.