Benchmark: Lodash.isEqual vs JSON.stringify Equality Comparison for Large Deep Object.

HTML Preparation code:

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

Script Preparation code:

window.foo = {
    name: "Michael",
    age: 36,
    location: {
        state: "OK",
        city: "Edmond",
        postal: "73012"
    },
    relatives: {
        wife: {
            name: "Shelley"
        },
        deep: {
            name: "Michael",
            age: 36,
            location: {
                state: "OK",
                city: "Edmond",
                postal: "73012"
            },
            relatives: {
                wife: {
                    name: "Shelley"
                },
                deep: {
                    name: "Michael",
                    age: 36,
                    location: {
                        state: "OK",
                        city: "Edmond",
                        postal: "73012"
                    },
                    relatives: {
                        wife: {
                            name: "Shelley"
                        },
                        deep: {
                            name: "Michael",
                            age: 36,
                            location: {
                                state: "OK",
                                city: "Edmond",
                                postal: "73012"
                            },
                            relatives: {
                                wife: {
                                    name: "Shelley"
                                }
                            }
                        }
                    }
                }
            }
        }
    }
};
window.bar = {
    name: "Michael",
    age: 36,
    location: {
        state: "OK",
        city: "Edmond",
        postal: "73012"
    },
    relatives: {
        wife: {
            name: "Shelley"
        },
        deep: {
            name: "Michael",
            age: 36,
            location: {
                state: "OK",
                city: "Edmond",
                postal: "73012"
            },
            relatives: {
                wife: {
                    name: "Shelley"
                },
                deep: {
                    name: "Michael",
                    age: 36,
                    location: {
                        state: "OK",
                        city: "Edmond",
                        postal: "73012"
                    },
                    relatives: {
                        wife: {
                            name: "Shelley"
                        },
                        deep: {
                            name: "Michael",
                            age: 36,
                            location: {
                                state: "OK",
                                city: "Edmond",
                                postal: "73012"
                            },
                            relatives: {
                                wife: {
                                    name: "Shelley"
                                }
                            }
                        }
                    }
                }
            }
        }
    }
};

Tests:

_.isEqual
_.isEqual(window.foo, window.bar)
JSON.stringify
JSON.stringify(window.foo) === JSON.stringify(window.bar);

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

Autogenerated LLM Summary (model llama3.2:3b, generated 26 days ago):

LLMs can make mistakes. Check important info.

Let's dive into the world of JavaScript microbenchmarks!

The provided JSON represents a benchmarking test created on MeasureThat.net, which compares the performance of two approaches: using Lodash's `isEqual` function and comparing the result of `JSON.stringify` with equality.

**Benchmark Definition**

The benchmark defines two test cases:

1. **`.isEqual(window.foo, window.bar)`**: This test case uses Lodash's `isEqual` function to compare two objects, `window.foo` and `window.bar`, for deep equality.
2. **`JSON.stringify(window.foo) === JSON.stringify(window.bar)`**: This test case compares the result of serializing both objects using `JSON.stringify` and checks if they are equal.

**Comparison Options**

We have three options being compared:

1. Lodash's `isEqual` function
2. Comparing the result of `JSON.stringify`
3. No optimization or comparison (not applicable in this case)

Let's break down each option:

* **Lodash's `isEqual` function**: This is a utility function that performs deep equality checking between two objects. It's useful when you need to check if two objects have the same properties, values, and structure.
	+ Pros:
		- Efficient for large objects with complex structures
		- Provides clear error messages for what went wrong during comparison
	+ Cons:
		- May be slower than simple equality checks due to its implementation
* **Comparing the result of `JSON.stringify`**: This approach uses JSON serialization to compare the two objects.
	+ Pros:
		- Fast and efficient, as it leverages built-in JavaScript functionality
	+ Cons:
		- May not work well for large or complex objects that don't serialize correctly
* **No optimization or comparison** (not applicable in this case): As mentioned earlier, this option is not being tested.

**Other Considerations**

When deciding which approach to use, consider the following factors:

* The size and complexity of the objects being compared. For large or complex objects, `isEqual` might be a better choice.
* The performance requirements of your application. If speed is critical, comparing the result of `JSON.stringify` might be a better option.
* The need for clear error messages during comparison. Lodash's `isEqual` function provides more detailed feedback in case of errors.

**Library: Lodash**

Lodash is a popular JavaScript utility library that provides various functions for tasks like array manipulation, string manipulation, and object comparison (like `isEqual`). In this benchmark, Lodash's `isEqual` function is used to compare two objects for deep equality.

**Special JS Features or Syntax**

In this benchmark, no special JavaScript features or syntax are being tested. The focus is on comparing the performance of two approaches using standard JavaScript functions.

Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:99.0) Gecko/20100101 Firefox/99.0

Browser/OS: Firefox 99 on Mac OS X 10.15

View result in a separate tab

Test name	Executions per second
_.isEqual	78712.4 Ops/sec
JSON.stringify	202843.2 Ops/sec

Related benchmarks:

Lodash.isEqual vs JSON.stringify Equality Comparison for Large Deep Object. (version: 0)

Test on isEqual performance Large deep object

Comparing performance of: _.isEqual vs JSON.stringify

Created: 2 years ago by: Guest

Jump to the latest result

_.isEqual

JSON.stringify

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 26 days ago):