node中执行代码，求输出

[LuckyWinty]

setImmediate(() => {
  console.log(1)
  setTimeout(() => {
    console.log(2)
  }, 100)
  setImmediate(() => {
    console.log(3)
  })
  process.nextTick(() => {
    console.log(4)
  })
})
process.nextTick(() => {
  console.log(5)
  setTimeout(() => {
    console.log(6)
  }, 100)
  setImmediate(() => {
    console.log(7)
  })
  process.nextTick(() => {
    console.log(8)
  })
})
console.log(9)

[LuckyWinty]

node11前：9->5->8->1->7->4->3->6->2 node11后：9->5->8->1->4->7->3->6->2