Benchmark: lodash vs fast-deep-equal using fast-deep-equal's tests

HTML Preparation code:


<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

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;
};


var tests = [
  {
    description: 'scalars',
    tests: [
      {
        description: 'equal numbers',
        value1: 1,
        value2: 1,
        equal: true
      },
      {
        description: 'not equal numbers',
        value1: 1,
        value2: 2,
        equal: false
      },
      {
        description: 'number and array are not equal',
        value1: 1,
        value2: [],
        equal: false
      },
      {
        description: '0 and null are not equal',
        value1: 0,
        value2: null,
        equal: false
      },
      {
        description: 'equal strings',
        value1: 'a',
        value2: 'a',
        equal: true
      },
      {
        description: 'not equal strings',
        value1: 'a',
        value2: 'b',
        equal: false
      },
      {
        description: 'empty string and null are not equal',
        value1: '',
        value2: null,
        equal: false
      },
      {
        description: 'null is equal to null',
        value1: null,
        value2: null,
        equal: true
      },
      {
        description: 'equal booleans (true)',
        value1: true,
        value2: true,
        equal: true
      },
      {
        description: 'equal booleans (false)',
        value1: false,
        value2: false,
        equal: true
      },
      {
        description: 'not equal booleans',
        value1: true,
        value2: false,
        equal: false
      },
      {
        description: '1 and true are not equal',
        value1: 1,
        value2: true,
        equal: false
      },
      {
        description: '0 and false are not equal',
        value1: 0,
        value2: false,
        equal: false
      },
      {
        description: 'NaN and NaN are equal',
        value1: NaN,
        value2: NaN,
        equal: true
      },
      {
        description: '0 and -0 are equal',
        value1: 0,
        value2: -0,
        equal: true
      },
      {
        description: 'Infinity and Infinity are equal',
        value1: Infinity,
        value2: Infinity,
        equal: true
      },
      {
        description: 'Infinity and -Infinity are not equal',
        value1: Infinity,
        value2: -Infinity,
        equal: false
      }
    ]
  },

  {
    description: 'objects',
    tests: [
      {
        description: 'empty objects are equal',
        value1: {},
        value2: {},
        equal: true
      },
      {
        description: 'equal objects (same properties "order")',
        value1: {a: 1, b: '2'},
        value2: {a: 1, b: '2'},
        equal: true
      },
      {
        description: 'equal objects (different properties "order")',
        value1: {a: 1, b: '2'},
        value2: {b: '2', a: 1},
        equal: true
      },
      {
        description: 'not equal objects (extra property)',
        value1: {a: 1, b: '2'},
        value2: {a: 1, b: '2', c: []},
        equal: false
      },
      {
        description: 'not equal objects (different property values)',
        value1: {a: 1, b: '2', c: 3},
        value2: {a: 1, b: '2', c: 4},
        equal: false
      },
      {
        description: 'not equal objects (different properties)',
        value1: {a: 1, b: '2', c: 3},
        value2: {a: 1, b: '2', d: 3},
        equal: false
      },
      {
        description: 'equal objects (same sub-properties)',
        value1: { a: [ { b: 'c' } ] },
        value2: { a: [ { b: 'c' } ] },
        equal: true
      },
      {
        description: 'not equal objects (different sub-property value)',
        value1: { a: [ { b: 'c' } ] },
        value2: { a: [ { b: 'd' } ] },
        equal: false
      },
      {
        description: 'not equal objects (different sub-property)',
        value1: { a: [ { b: 'c' } ] },
        value2: { a: [ { c: 'c' } ] },
        equal: false
      },
      {
        description: 'empty array and empty object are not equal',
        value1: {},
        value2: [],
        equal: false
      },
      {
        description: 'object with extra undefined properties are not equal #1',
        value1: {},
        value2: {foo: undefined},
        equal: false
      },
      {
        description: 'object with extra undefined properties are not equal #2',
        value1: {foo: undefined},
        value2: {},
        equal: false
      },
      {
        description: 'object with extra undefined properties are not equal #3',
        value1: {foo: undefined},
        value2: {bar: undefined},
        equal: false
      },
      {
        description: 'nulls are equal',
        value1: null,
        value2: null,
        equal: true
      },
      {
        description: 'null and undefined are not equal',
        value1: null,
        value2: undefined,
        equal: false
      },
      {
        description: 'null and empty object are not equal',
        value1: null,
        value2: {},
        equal: false
      },
      {
        description: 'undefined and empty object are not equal',
        value1: undefined,
        value2: {},
        equal: false
      },
      {
        description: 'objects with different `toString` functions returning same values are equal',
        value1: {toString: ()=>'Hello world!'},
        value2: {toString: ()=>'Hello world!'},
        equal: true
      },
      {
        description: 'objects with `toString` functions returning different values are not equal',
        value1: {toString: ()=>'Hello world!'},
        value2: {toString: ()=>'Hi!'},
        equal: false
      }
    ]
  },

  {
    description: 'arrays',
    tests: [
      {
        description: 'two empty arrays are equal',
        value1: [],
        value2: [],
        equal: true
      },
      {
        description: 'equal arrays',
        value1: [1, 2, 3],
        value2: [1, 2, 3],
        equal: true
      },
      {
        description: 'not equal arrays (different item)',
        value1: [1, 2, 3],
        value2: [1, 2, 4],
        equal: false
      },
      {
        description: 'not equal arrays (different length)',
        value1: [1, 2, 3],
        value2: [1, 2],
        equal: false
      },
      {
        description: 'equal arrays of objects',
        value1: [{a: 'a'}, {b: 'b'}],
        value2: [{a: 'a'}, {b: 'b'}],
        equal: true
      },
      {
        description: 'not equal arrays of objects',
        value1: [{a: 'a'}, {b: 'b'}],
        value2: [{a: 'a'}, {b: 'c'}],
        equal: false
      },
      {
        description: 'pseudo array and equivalent array are not equal',
        value1: {'0': 0, '1': 1, length: 2},
        value2: [0, 1],
        equal: false
      }
    ]
  },
  {
    description: 'Date objects',
    tests: [
      {
        description: 'equal date objects',
        value1: new Date('2017-06-16T21:36:48.362Z'),
        value2: new Date('2017-06-16T21:36:48.362Z'),
        equal: true
      },
      {
        description: 'not equal date objects',
        value1: new Date('2017-06-16T21:36:48.362Z'),
        value2: new Date('2017-01-01T00:00:00.000Z'),
        equal: false
      },
      {
        description: 'date and string are not equal',
        value1: new Date('2017-06-16T21:36:48.362Z'),
        value2: '2017-06-16T21:36:48.362Z',
        equal: false
      },
      {
        description: 'date and object are not equal',
        value1: new Date('2017-06-16T21:36:48.362Z'),
        value2: {},
        equal: false
      }
    ]
  },
  {
    description: 'RegExp objects',
    tests: [
      {
        description: 'equal RegExp objects',
        value1: /foo/,
        value2: /foo/,
        equal: true
      },
      {
        description: 'not equal RegExp objects (different pattern)',
        value1: /foo/,
        value2: /bar/,
        equal: false
      },
      {
        description: 'not equal RegExp objects (different flags)',
        value1: /foo/,
        value2: /foo/i,
        equal: false
      },
      {
        description: 'RegExp and string are not equal',
        value1: /foo/,
        value2: 'foo',
        equal: false
      },
      {
        description: 'RegExp and object are not equal',
        value1: /foo/,
        value2: {},
        equal: false
      }
    ]
  },
  {
    description: 'functions',
    tests: [
      {
        description: 'same function is equal',
        value1: func1,
        value2: func1,
        equal: true
      },
      {
        description: 'different functions are not equal',
        value1: func1,
        value2: func2,
        equal: false
      }
    ]
  },
  {
    description: 'sample objects',
    tests: [
      {
        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
      }
    ]
  }
];

function func1() {}
function func2() {}

Tests:

fast-deep-equal
for (const testSuite of tests) { for (const test of testSuite.tests) { try { if (equal(test.value1, test.value2) !== test.equal) console.error('different result', 'fast-deep-equal', testSuite.description, test.description); } catch(e) { console.error('fast-deep-equal', testSuite.description, test.description, e); } } }
lodash
for (const testSuite of tests) { for (const test of testSuite.tests) { try { if (_.isEqual(test.value1, test.value2) !== test.equal) console.error('different result', 'isEqual', testSuite.description, test.description); } catch(e) { console.error('isEqual', testSuite.description, test.description, e); } } }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
fast-deep-equal
lodash

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated one month ago):

LLMs can make mistakes. Check important info.

Based on the provided benchmark data, I'll provide an analysis of the results:

**fast-deep-equal**

* **Raw UA String:** Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/116.0.0.0 Safari/537.36
* **Browser:** Chrome 116
* **Device Platform:** Desktop
* **Operating System:** Mac OS X 10.15.7
* **Executions Per Second:** 24,893.38

The test results indicate that the `fast-deep-equal` benchmark is performed on a Chrome 116 browser with a desktop device and Mac OS X 10.15.7 operating system.

**lodash**

The test results indicate that the `lodash` benchmark is performed on a Chrome 116 browser with a desktop device and Mac OS X 10.15.7 operating system.

Comparing the two results:

* The `fast-deep-equal` benchmark has a slightly higher **Executions Per Second** (24,893.38 vs 20,243.62) than the `lodash` benchmark.
* Both benchmarks are performed on Chrome 116 with a desktop device and Mac OS X 10.15.7 operating system.

This suggests that the `fast-deep-equal` benchmark may be faster or more efficient than the `lodash` benchmark under these specific conditions. However, it's essential to note that this result is based on a single run and may not reflect the actual performance difference between the two implementations in all scenarios.

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/116.0.0.0 Safari/537.36

Browser/OS: Chrome 116 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
fast-deep-equal	24893.4 Ops/sec
lodash	20243.6 Ops/sec

Related benchmarks:

lodash vs fast-deep-equal using fast-deep-equal's tests (version: 0)

Comparing performance of: fast-deep-equal vs lodash

Created: one year ago by: Registered User

Jump to the latest result

fast-deep-equal

lodash

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated one month ago):