gistfile1.txt

function wait(fn, w){
    let last = new Date(0);
    let res;

    return function(...args){
        const time = new Date();

        if(last.getTime() + w < time.getTime()){
            res = fn.apply(this, args);
            last = time;
            return res;
        }else{
            return res;
        }
    }
}

const fn = wait(function(a,b){ return a+b; }, 500);
const f = wait(function(...args){ console.log(fn.apply(this, args))}, 300);

for(let i = 0; i < 10000000; i++){
    f(0,i);
}