Benchmark Javascript binary equals

benchmark-binary.equals.ts

// Generate random data
const num = 1000000;
const dataArr: {a: Uint8Array; b: Uint8Array}[] = [];
const len = 32;
for (let i = 0; i < num; i++) {
  const nums: number[] = [];
  for (let j = 0; j < len; j++) {
    nums[j] = j;
  }
  const a = new Uint8Array(nums);
  const b = new Uint8Array(nums);
  dataArr.push({a, b});
}

function equalsFor(a: Uint8Array, b: Uint8Array): boolean {
  for (let i = 0; i < a.length; i++) {
    if (a[i] !== b[i]) return false;
  }
  return true;
}

function equalsEvery(a: Uint8Array, b: Uint8Array): boolean {
  return a.every((v, i) => v === b[i]);
}

function equalsNode(a: Uint8Array, b: Uint8Array): boolean {
  return Buffer.compare(Buffer.from(a), Buffer.from(b)) === 0;
}

// Run benchmarks
for (const [id, fn] of Object.entries({equalsFor, equalsEvery, equalsNode})) {
  const label = `${num} - ${id}`;
  console.time(label);
  for (const {a, b} of dataArr) fn(a, b);
  console.timeEnd(label);
}

// 1000000 - equalsFor:   132.577ms
// 1000000 - equalsEvery: 579.814ms
// 1000000 - equalsNode:  486.077ms