JIT? What is JIT

A modern approach to optimized code execution is to use just in time compilers. The idea here is to analyze the code whilst execution and apply optimization strategies on the fly.

• As soon as the aim and properties of a program get apparent, more efficient ways and code blocks can be used to solve the task.

• Often tracing strategies are used for that.

• This will usually not be as efficient as to use real pre-execution compiles, but can get very close.

• Tracing jit compilers can sometimes even beat naive pre-execution compiler work.

• The jit approach will in general work for all interpreted languages - and therefore for Python - quite well.

Note

jit compilers in general benefit from variables and data structures that don’t change at runtime. This can be your entry into typing.