why try catch block faster than normal in NodeJS v7

function f(){
    let n = 0
    console.time('f')

    for (let i = 0; i < 1000000000; i++) {
        n += 1
    }

    console.timeEnd('f')
}

function g(){
    let n = 0
    console.time('g')

    try {
        for (let i = 0; i < 1000000000; i++) {
            try {
                n += 1
            }catch(e) {}
        }
    }catch(e){}

    console.timeEnd('g')
}
f();g();

output result

➜  static node -v
v7.9.0
➜  static node test.js
f: 11293.079ms
g: 5800.848ms
➜  static sudo n 6.9.5
➜  static node -v
v6.9.5
➜  static node test.js
f: 9922.718ms
g: 12212.024ms
➜  static

why try catch block faster than normal 2x

is that means we should work with all try?

try everything to get more performance

hope to get the answer

thankx all

via Shinhwe