Benchmark: stringify vs isEqual

HTML Preparation code:

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

Script Preparation code:

var a = {key: { query: 'hello', tags: ['a', 'b', 'c'] }, search: true, type: 'type'}
var b = {key: { query: 'hello', tags: ['a', 'b', 'c'] }, search: true, type: 'type'}

Tests:

lodash
_.isEqual(a, b)
json
JSON.stringify(a) === JSON.stringify(b)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
lodash
json

Fastest: N/A

Slowest: N/A

Latest run results:

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

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Let's break down the provided benchmark and explain what's being tested, compared, and considered.

**Benchmark Overview**

The provided benchmark measures the performance difference between two approaches:

1. Using the `lodash` library for equality comparison (`_.isEqual(a, b)`).
2. Performing a simple string comparison using the `===` operator with `JSON.stringify()` (`JSON.stringify(a) === JSON.stringify(b)`).

**Options Compared**

The two options being compared are:

* **Lodash Equality Function**: The `lodash` library provides an `isEqual()` function that recursively compares two objects for equality.
* **JSON Stringification and Comparison**: This approach involves converting both objects to strings using `JSON.stringify()`, comparing these strings for equality, and then stripping off the quotes.

**Pros and Cons**

**Lodash Equality Function**

Pros:

* Robustness: The `lodash` library provides a tested and well-maintained implementation of the equality comparison algorithm.
* Performance: Although not explicitly measured in this benchmark, the optimized JavaScript engine should handle the recursive comparisons efficiently.

Cons:

* Dependency on Lodash: This approach requires including an additional library, which might add overhead due to its size and potential download latency.
* Complexity: The `isEqual()` function can be confusing for those unfamiliar with it, as it handles various edge cases (e.g., NaN, Infinity, null).

**JSON Stringification and Comparison**

Pros:

* Lightweight: This approach requires no additional libraries or dependencies.
* Simple: The comparison is straightforward and easy to understand.

Cons:

* Edge Cases: Handling edge cases like NaN, Infinity, null, or undefined might lead to incorrect results or errors in some browsers.
* Performance: Although `JSON.stringify()` is fast, the repeated string creation and comparison might introduce additional overhead compared to a custom implementation with memoization.

**Library: Lodash**

Lodash is a popular JavaScript utility library that provides a range of functions for tasks like array manipulation, object transformation, and equality comparison. In this benchmark, it's used for its `isEqual()` function, which recursively compares two objects or values for equality.

**Special JS Features/Syntax**

There are no notable special features or syntaxes being tested in this benchmark. However, if you're interested in exploring other performance-related benchmarks, consider looking into the following alternatives:

* **V8 Benchmark Suite**: A collection of micro-benchmarks that target specific aspects of JavaScript engine optimization, such as stringification and object equality.
* **JSHint Performance Benchmarks**: Microbenchmarks that focus on performance-critical parts of the JSHint library.
* **JavaScript Perfome**: A benchmarking framework for testing JavaScript performance under different conditions.

Related benchmarks:

stringify vs isEqual (version: 0)

Comparing performance of: lodash vs json

Created: 6 years ago by: Guest

Jump to the latest result

lodash

json

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):