SOURCE

function timeFunc(func) {
    var start = new Date().getTime()
    console.log('开始')
    func()
    var end = new Date().getTime()
    console.log('结束')
    console.log(end - start + ' ms');
}

function twoSum(nums = [3, 3, 4], target = 6) {
    const resArr = []
    for (let index = 0; index < nums.length; index++) {
        let oth = nums.slice(index+1)
        if (oth.length === 0) break
        if(oth.indexOf(target - nums[index]) !== -1){
            resArr.push(index,oth.indexOf(target - nums[index]+index))
        }
        console.log(resArr)
    }
}

timeFunc(twoSum)