Benchmark: Lodash.isEqual vs JSON.stringify Equality Comparison for Shallow Array of Strings. temp test fork

HTML Preparation code:

<script src="https://cdn.jsdelivr.net/npm/lodash@4.17.4/lodash.min.js"></script>

Script Preparation code:

window.foo = [
  {
    test: 1,
    test2: {
      cate: 4,
      jake: [
        1,
        2,
        'abc',
        {
          cate: 4,
          jake: [1, 2, 'abc']
        }
      ]
    },
    cate: 4,
    jake: [1, 2, 'abc']
  },
  'cat',
  'dog',
  'bird'
];
window.bar = [
  {
    test: 1,
    test2: {
      cate: 4,
      jake: [
        1,
        2,
        'abc',
        {
          cate: 4,
          jake: [1, 2, 'abc']
        }
      ]
    },
    cate: 4,
    jake: [1, 2, 'abc']
  },
  'cat',
  'dog',
  'bird'
];

Tests:

_.isEqual
_.isEqual(window.foo, window.bar)
JSON.stringify
getJsonHash(window.foo) === getJsonHash(window.bar); function getJsonHash(object) { return JSON.stringify(object).split('').reduce(reduce, 0); function reduce(prevHash, currVal) { return (((prevHash << 5) - prevHash) + currVal.charCodeAt(0)) | 0; } }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
_.isEqual
JSON.stringify

Fastest: N/A

Slowest: N/A

Latest run results:

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

LLMs can make mistakes. Check important info.

Let's break down the provided JSON and explain what's being tested, compared, and their pros and cons.

**Benchmark Definition**

The benchmark is testing two approaches to compare two arrays of strings:

1. `_.isEqual(window.foo, window.bar)` - using Lodash's `isEqual` function.
2. `getJsonHash(window.foo) === getJsonHash(window.bar)` - by converting both arrays to JSON strings and comparing them.

**Lodash.isEqual**

`_._isEqual` is a utility function provided by the Lodash library that compares two values for deep equality. It checks if two values have the same value, type, and structure (i.e., the same object hierarchy).

Pros:

* Efficient for deep comparisons, especially when dealing with complex data structures.
* Avoids unnecessary computations by only comparing relevant parts of the objects.

Cons:

* Can be slower than a simple string comparison due to its overhead from recursive function calls.
* May not perform well on very large datasets or if the equality check is computationally expensive.

**JSON.stringify Equality Comparison**

This approach converts both arrays to JSON strings using `JSON.stringify()` and then compares them. The idea is that if two arrays are equal, their JSON representations will be identical.

Pros:

* Fast and lightweight, as it only requires a single string conversion.
* Simple to implement and understand.

Cons:

* Fails for non-string values or nested objects with complex structures.
* May not work correctly for cyclic references (i.e., an object references itself).
* The comparison is done by comparing two strings, which can be slower than a direct array comparison.

**Other Considerations**

* In the provided benchmark, it's worth noting that both arrays have identical values and structure, making `_.isEqual` a relatively straightforward test.
* If the benchmark were to include more complex data structures or edge cases (e.g., null, undefined, or cyclic references), Lodash's `isEqual` might struggle.

**Library: Lodash**

Lodash is a popular JavaScript utility library that provides various functions for tasks like array manipulation, object comparison, and string formatting. The `isEqual` function is a key part of this library and helps with complex comparisons.

In the context of this benchmark, using Lodash's `isEqual` allows developers to focus on the performance aspect of their code without worrying about implementing the equality check from scratch.

**Special JS Feature: None**

This benchmark doesn't require any special JavaScript features or syntax beyond what's provided by modern browsers.

Related benchmarks:

Lodash.isEqual vs JSON.stringify Equality Comparison for Shallow Array of Strings. temp test fork (version: 0)

Test on isEqual performance

Comparing performance of: _.isEqual vs JSON.stringify

Created: 6 years ago by: Guest

Jump to the latest result

_.isEqual

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):