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从即日起，小编将会在每天推出一道面试必备题目，日积月累，定能让你在下一次面试的时候拿到更好的offer,一起努力吧

今日题目

请问以下代码输出顺序是什么?

async function async1() {
    console.log("async1 start");
    await  async2();
    console.log("async1 end");
}
async  function async2() {
    console.log( 'async2');
}
console.log("script start");
setTimeout(function () {
    console.log("settimeout");
});
async1()
new Promise(function (resolve) {
    console.log("promise1");
    resolve();
}).then(function () {
    console.log("promise2");
});
setImmediate(()=>{
    console.log("setImmediate")
})
process.nextTick(()=>{
    console.log("process")
})
console.log('script end');