Array Performance

array.js

var arr = [
  {
    name: "John",
    age: 20
  }, {
    name: "Ally",
    age: 25
  }, {
    name: "Jordan",
    age: 30
  }
]

var getArrByName = function(name) {
  // Implement this function
}

console.log(getArrByName("Ally"))
// should equal to {name: "Ally", age: 25}