proxy.js

let Process = require('process')
let obj = {
    toto () {
        return 42
    }
}

function *range(s, e) {
    for (; s < e; s++) {
        yield s
    }
}

let proxy = new Proxy(obj, {
    get (target, method) {
        return (...args) => {
            return target[method].apply(target, ...args)
        }
    }
})


const ITERATIONS = 1000000
console.time('call function directly')
for (let r of range(0, ITERATIONS)) {
    obj.toto()
}
console.timeEnd('call function directly')

console.time('call function via proxy')
for (let r of range(0, ITERATIONS)) {
    proxy.toto()
}
console.timeEnd('call function via proxy'