// Populate Array size of 10 Million data 😱
let data = [];
const tenMillion = 10_000_000;
console.log("starts");
console.time("prepare array");
for (let i = 0; i < tenMillion; i++) {
  data.push({ item: i, number: `Number_${i}` });
}
console.timeEnd("prepare array");

// Populate Array size of 50 having random numbers.
// We will search each item of this array in that big size of array 🤒
const itemsToSearch = Array.from(
  { length: 50 },
  () => ~~(Math.random() * 9_000_000)
);

console.time("transform_array_to_dictionary");
console.time("time_including_tranforming_array_to_dict");
let dataDict = {};
data.forEach((d) => (dataDict[d.item] = d));
console.timeEnd("transform_array_to_dictionary");

console.log("Dictionary search starts");
const startTime = new Date().getTime();
const timeLogs = itemsToSearch.map((searchItem) => {
  const start = new Date().getTime();
  const item = dataDict[searchItem];
  const end = new Date().getTime();
  return `Took ${end - start} Milliseconds to find ${searchItem}`;
});
const endTime = new Date().getTime();
// console.log(timeLogs);
console.timeEnd("time_including_tranforming_array_to_dict");

const resultElement = document.getElementById("result");
resultElement.innerText = `Searching the array took ${
  endTime - startTime
} milliseconds for ${
  itemsToSearch.length
} items over 10 Million size of Array.`;

console.log(
  `Searching the array took ${endTime - startTime} milliseconds for ${
    itemsToSearch.length
  } items over 10 Million size of Array.`
);