Happy New year, everyone. How many codes do you want to eat?

setTimeout(test2, 3000)
function test2 () {
  var leak = []
  for (var i = 0; i < 2000000; iPP) {
    leak.push(new Date())
  } //  IE  267M test1  null 
  leak = null //  null 
}

setTimeout(test3, 3000)
function test3 () {
  var leak = []
  for (var i = 0; i < 10000000; iPP) { // 
    leak.push(" new Date() ")
  } //  IE  40M  push  124M 41.7M
}

setTimeout(test4, 3000)
function test4 () {
  for (var i = 0; i < 10000000; iPP) {
    var a = new Date()
  } //  40~50M  new Date() 
}