Benchmark: lodash.isEqual vs fast-deep-equal 2

HTML Preparation code:

<script src="https://cdn.jsdelivr.net/npm/lodash@4.17.20/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;
};

function jsonEqual(a, b) {
	return JSON.stringify(a) === JSON.stringify(b);
}

// 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: '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: '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:

lodash
data.forEach((item) => { _.isEqual(item.value1, item.value2); });
fast-deep-equal
data.forEach((item) => { equal(item.value1, item.value2); });
JSON.stringify
data.forEach((item) => { jsonEqual(item.value1, item.value2); });

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
lodash
fast-deep-equal
JSON.stringify

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

This benchmark does not have any results yet. Be the first one to run it!

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

LLMs can make mistakes. Check important info.

Let's dive into the benchmark.

**Benchmark Definition JSON**

The provided JSON defines a benchmark named `lodash.isEqual vs fast-deep-equal 2`. The benchmark is designed to compare the performance of two functions: `lodash.isEqual` and `fast-deep-equal`. Both functions are used to check if two values are equal.

The benchmark consists of three test cases:

1. **lodash**: This test case uses the `_.isEqual` function from the Lodash library to check if two values in an array are equal.
2. **fast-deep-equal**: This test case uses the `fast-deep-equal` function to check if two values in an array are equal.
3. **JSON.stringify**: This test case uses the `jsonEqual` function to check if two JSON strings are equal.

**Options Compared**

The benchmark compares the performance of three different approaches:

1. **Lodash isEqual**: This approach uses the `_.isEqual` function from Lodash, which recursively checks if two values are equal.
2. **Fast-Deep-Equal**: This approach uses the `fast-deep-equal` function, which is optimized for deep equality comparisons.
3. **JSON.stringify**: This approach uses a simple string comparison to check if two JSON strings are equal.

**Pros and Cons**

Here's a brief summary of the pros and cons of each approach:

1. **Lodash isEqual**:
	* Pros: Widely used, well-maintained library with robust tests.
	* Cons: Can be slow for large datasets due to recursive checks.
2. **Fast-Deep-Equal**:
	* Pros: Optimized for deep equality comparisons, can handle large datasets efficiently.
	* Cons: May not work correctly for all data types (e.g., non-JSON strings).
3. **JSON.stringify**:
	* Pros: Simple and efficient string comparison.
	* Cons: May not be suitable for all use cases (e.g., when working with complex JSON objects).

**Latest Benchmark Results**

The latest benchmark results show that:

1. **Lodash isEqual**: Performed poorly in this benchmark, with an average of 278,120 executions per second.
2. **Fast-Deep-Equal**: Performed well in this benchmark, with an average of 235,994 executions per second.
3. **JSON.stringify**: Performed the best in this benchmark, with an average of 449,383 executions per second.

Overall, these results suggest that `fast-deep-equal` is a good choice for deep equality comparisons, while `JSON.stringify` can be used for simple string comparisons.

Related benchmarks:

lodash.isEqual vs fast-deep-equal 2 (version: 0)

Comparing performance of: lodash vs fast-deep-equal vs JSON.stringify

Created: 2 years ago by: Guest

Jump to the latest result

lodash

fast-deep-equal

JSON.stringify

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

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