v8优化回退测试

let arr = [132,4,5,6,'23',34,'555'];
function addInt(a,b){ return a + b };
function addStr(a,b) { return a + b };
function addAll(a,b) { return a + b };
let time = 200000;
function runSum0() {
    for (var i = 0; i < time; i++) {
        let k = arr[i % arr.length];
        if (typeof k == 'string') {
            //console.log('str',addStr(k, k));
addStr(k, k)
        } else {
            //console.log('int:',addInt(k, k));
addInt(k, k)
        }
    }
}
function runSum1() {
    for (var i = 0; i < time; i++) {
        let k = arr[i % arr.length];
        //console.log('--:',addInt(k, k));
addAll(k, k)
    }
}
let t1 = Date.now();
runSum0();
console.log("runTime1", (Date.now() - t1));
t1 = Date.now();
runSum1();
console.log("runTime2", (Date.now() - t1));
VM364:27 runTime1 6
VM364:30 runTime2 7
undefined
time = 10000000
t1 = Date.now();
runSum0();
console.log("runTime1", (Date.now() - t1));
t1 = Date.now();
runSum1();
console.log("runTime2", (Date.now() - t1));
VM385:4 runTime1 47
VM385:7 runTime2 167
undefined
time = 100000000;
t1 = Date.now();
runSum0();
console.log("runTime1", (Date.now() - t1));
t1 = Date.now();
runSum1();
console.log("runTime2", (Date.now() - t1));
VM389:4 runTime1 449
VM389:7 runTime2 1616