SOURCE

function trace(o, m) {
    let original = o[m];
    o[m] = function (...args) {
        console.log(new Date(), 'Entering', m);
        let result = original.apply(this, args);
        console.log(new Date(), 'Exiting:', m);
        return result;
    }
}

const m = {
    m: 1
}
const a = {
    a: 'a'
}
function benchmark(n) {
    let sum = 0;
    for (let i = 1; i <= n; i++) sum += i;
    return sum;
}
console.log('traceObj:',  trace(m, a)(100000));