Run results for: lodash isEqual vs redux shallowEqual test 1

Test name	Executions per second
✓ shallowEqual1	158,047,552 Ops/sec
lodash1	147,484,592 Ops/sec
shallowEqual0	146,226,544 Ops/sec
lodash0	136,780,000 Ops/sec
lodash4	117,902,464 Ops/sec
shallowEqual4	112,982,168 Ops/sec
shallowEqual5	19,101,022 Ops/sec
lodash2	12,892,147 Ops/sec
shallowEqual3	6,002,754 Ops/sec
shallowEqual2	3,079,147 Ops/sec
lodash3	2,395,724 Ops/sec
lodash5	648,672 Ops/sec

Script Preparation code:

function equal(a, b) {
  if (a === b) return true;

  if (a && b && typeof a == 'object' && typeof b == 'object') {
    if (a.constructor !== b.constructor) return false;

    var length, i, keys;
    if (Array.isArray(a)) {
      length = a.length;
      if (length != b.length) return false;
      for (i = length; i-- !== 0;)
        if (!equal(a[i], b[i])) return false;
      return true;
    }



    if (a.constructor === RegExp) return a.source === b.source && a.flags === b.flags;
    if (a.valueOf !== Object.prototype.valueOf) return a.valueOf() === b.valueOf();
    if (a.toString !== Object.prototype.toString) return a.toString() === b.toString();

    keys = Object.keys(a);
    length = keys.length;
    if (length !== Object.keys(b).length) return false;

    for (i = length; i-- !== 0;)
      if (!Object.prototype.hasOwnProperty.call(b, keys[i])) return false;

    for (i = length; i-- !== 0;) {
      var key = keys[i];

      if (!equal(a[key], b[key])) return false;
    }

    return true;
  }

  // true if both NaN, false otherwise
  return a!==a && b!==b;
};

function is(x, y) {
  if (x === y) {
    return x !== 0 || y !== 0 || 1 / x === 1 / y
  } else {
    return x !== x && y !== y
  }
}

function shallowEqual(objA, objB) {
  if (is(objA, objB)) return true

  if (
    typeof objA !== 'object' ||
    objA === null ||
    typeof objB !== 'object' ||
    objB === null
  ) {
    return false
  }

  const keysA = Object.keys(objA)
  const keysB = Object.keys(objB)

  if (keysA.length !== keysB.length) return false

  for (let i = 0; i < keysA.length; i++) {
    if (
      !Object.prototype.hasOwnProperty.call(objB, keysA[i]) ||
      !is(objA[keysA[i]], objB[keysA[i]])
    ) {
      return false
    }
  }

  return true
}

// 1 level deep
var data = [
                    {
                        description: 'equal numbers',
                        value1: 1,
                        value2: 1,
                        equal: true,
                    },
                    {
                        description: 'not equal numbers',
                        value1: 1,
                        value2: 2,
                        equal: false,
                    },
                    {
                        description: 'simple array, same primitive values',
                        value1: [1,2,3,4],
                        value2: [1,2,3,4],
                        equal: true,
                    },
                    {
                        description: 'array, same deep values',
                        value1: [[0],{x: 1},[3]],
                        value2: [[0],{x: 1},[3]],
                        equal: true, // deep equal, not shallow equal
                    },
                    {
                        description: 'equal strings',
                        value1: 'a',
                        value2: 'a',
                        equal: true,
                    },
                    {
                        description: 'big object',
                        value1: {
                            prop1: 'value1',
                            prop2: 'value2',
                            prop3: 'value3',
                            prop4: {
                                subProp1: 'sub value1',
                                subProp2: {
                                    subSubProp1: 'sub sub value1',
                                    subSubProp2: [
                                        1,
                                        2,
                                        { prop2: 1, prop: 2 },
                                        4,
                                        5,
                                    ],
                                },
                            },
                            prop5: 1000,
                            prop6: new Date(2016, 2, 10),
                        },
                        value2: {
                            prop5: 1000,
                            prop3: 'value3',
                            prop1: 'value1',
                            prop2: 'value2',
                            prop6: new Date('2016/03/10'),
                            prop4: {
                                subProp2: {
                                    subSubProp1: 'sub sub value1',
                                    subSubProp2: [
                                        1,
                                        2,
                                        { prop2: 1, prop: 2 },
                                        4,
                                        5,
                                    ],
                                },
                                subProp1: 'sub value1',
                            },
                        },
                        equal: true,
                    },
                ];

Tests:

lodash0
_.isEqual(data[0].value1, data[0].value2)
shallowEqual0
shallowEqual(data[0].value1, data[0].value2)
lodash1
_.isEqual(data[1].value1, data[1].value2)
shallowEqual1
shallowEqual(data[1].value1, data[1].value2)
lodash2
_.isEqual(data[2].value1, data[2].value2)
shallowEqual2
shallowEqual(data[2].value1, data[2].value2)
lodash3
_.isEqual(data[3].value1, data[3].value2)
shallowEqual3
shallowEqual(data[3].value1, data[3].value2)
lodash4
_.isEqual(data[4].value1, data[4].value2)
shallowEqual4
shallowEqual(data[4].value1, data[4].value2)
lodash5
_.isEqual(data[5].value1, data[5].value2)
shallowEqual5
shallowEqual(data[5].value1, data[5].value2)

Run results for: lodash isEqual vs redux shallowEqual test 1

lodash0

shallowEqual0

lodash1

shallowEqual1

lodash2

shallowEqual2

lodash3

shallowEqual3

lodash4

shallowEqual4

lodash5

shallowEqual5