how to free menus memory

@Gordon, I wonder how the interpreter works on this line https://github.com/wagnerf42/gps/blob/main/app.js#L339
it is called in a for loop - does the parser parse the function again each loop cycle or the second pass will reference previously parsed body only with different context with different variable values? or if the function would contain "jit" inside would it make separate copies of the method each loop iteration? how much wasteful this repetitive function definition it is regarding memory per each loop?