Benchmark: json stringify vs array tostring vs array join 2d array

Script Preparation code:

function moreData(arr, left) {
    if (left === 0) return arr;
    else {
        arr.push([Math.floor(Math.random() * 256), Math.floor(Math.random() * 256), Math.floor(Math.random() * 256), Math.floor(Math.random() * 256)]);
        return moreData(arr, left - 1);
    }
}

function makeTestData() {
    return moreData([], 10);
}

Tests:

toString
makeTestData().toString()
JSON.stringify
JSON.stringify(makeTestData());
Array.join
makeTestData().join(',')

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
toString
JSON.stringify
Array.join

Fastest: N/A

Slowest: N/A

Latest run results:

No previous 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 dive into the benchmark.

**Benchmark Overview**

The provided benchmark compares three ways to convert a 2D array into a string: `toString()`, `JSON.stringify()`, and `Array.join()`.

**Test Case Explanation**

1. **`toString()`**: This method converts the entire object into a string, which includes all its properties, including the nested arrays.
2. **`JSON.stringify()`**: This method converts an object (or in this case, an array) into a JSON string, which is a serialized representation of the data.
3. **`Array.join()`**: This method concatenates all elements in the array into a single string, separated by a comma.

**Library Usage**

None of the test cases use any libraries other than built-in JavaScript methods and functions.

**Special JS Features/Syntax**

* None mentioned, as the code only uses standard JavaScript syntax and features.

**Benchmark Results**

The benchmark results show the number of executions per second for each test case on a Chrome 117 browser running on a Mac OS X 10.15.7 machine. The results are:

| Test Name | Executions Per Second |
| --- | --- |
| `JSON.stringify()` | 163,712.4375 |
| `toString()` | 144,685.34375 |
| `Array.join()` | 138,438.25 |

**Comparison**

* `JSON.stringify()` seems to be the fastest method, followed closely by `toString()`.
* `Array.join()` is the slowest method.

**Pros and Cons of Each Approach**

1. **`JSON.stringify()`**:
	* Pros: fast, concise, and widely supported.
	* Cons: may not work well with complex data structures or non-serializable objects.
2. **`toString()`**:
	* Pros: simple, easy to understand, and works well for most cases.
	* Cons: can be slow for large arrays, and the resulting string may not be very human-readable.
3. **`Array.join()`**:
	* Pros: fast, and can produce a nice, compact string.
	* Cons: can be slower than `JSON.stringify()` or `toString()`, and may not work well with non-string elements in the array.

**Alternative Approaches**

Other ways to convert a 2D array into a string include:

1. Using a library like Lodash's `compact` function, which converts an object (or array) into a human-readable string.
2. Implementing your own custom conversion logic using a recursive function or a loop.
3. Using a templating engine like Handlebars to generate the string.

However, these alternatives may not be as straightforward as the three methods being compared in this benchmark.

Related benchmarks:

json stringify vs array tostring vs array join 2d array (version: 0)

Comparing performance of: toString vs JSON.stringify vs Array.join

Created: 2 years ago by: Guest

Jump to the latest result

toString

JSON.stringify

Array.join

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):