Benchmark: args stringify vs join vs toString

Script Preparation code:

var arr = ['123', undefined, false, 'abc', 'flex', 'flex-row', 'items-center justify-center', undefined, undefined, false];

Tests:

stringify
JSON.stringify(arr)
join
arr.filter(Boolean).join(' ')
toString
arr.toString()

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
stringify
join
toString

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125.0.0.0 Safari/537.36

Browser/OS: Chrome 125 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
stringify	2178574.5 Ops/sec
join	1984807.5 Ops/sec
toString	2884137.8 Ops/sec

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

LLMs can make mistakes. Check important info.

**Benchmark Overview**

The provided JSON represents a JavaScript microbenchmarking test case on MeasureThat.net. The benchmark compares the performance of three different approaches to convert an array into a string: `JSON.stringify()`, `Array.prototype.join()` with `Boolean` filtering, and `toString()`.

**Approaches Compared**

1. **JSON.stringify()**: This method serializes the entire array object into a JSON string. It's useful for converting complex objects into a compact representation.
2. **Array.prototype.join()` with `Boolean` filtering: This approach uses the `join()` method to concatenate the elements of the array into a single string, separated by spaces. The `Boolean` filtering ensures that only truthy values are included in the resulting string.
3. **toString()**: This method returns a string representation of the entire array object.

**Pros and Cons of Each Approach**

1. **JSON.stringify()**:
	* Pros: Compact representation, works well with complex objects.
	* Cons: May not be suitable for arrays with mixed data types or large amounts of whitespace.
	* Performance: Can be slower due to the overhead of serializing the entire object.
2. **Array.prototype.join()` with `Boolean` filtering**:
	* Pros: Efficient use of memory, suitable for arrays with a mix of truthy and falsy values.
	* Cons: May not work as expected if there are many whitespace characters or null/undefined values in the array.
	* Performance: Generally faster than JSON.stringify(), especially for large arrays.
3. **toString()**:
	* Pros: Simple and straightforward, works well with most data types.
	* Cons: May result in a larger string representation due to the inclusion of unnecessary whitespace characters.
	* Performance: Typically slower than `join()` with filtering.

**Library Usage**

None of the benchmarked methods rely on any external libraries. However, `JSON.stringify()` uses the built-in `JSON` object and serialization algorithm.

**Special JS Features/Syntax**

None mentioned in this specific test case.

**Alternative Approaches**

If you need to convert an array into a string and require more control over the output or performance, consider the following alternatives:

* Using a library like [json-stringify-safe](https://www.npmjs.com/package/json-stringify-safe) for more robust JSON serialization.
* Implementing a custom conversion function that takes into account specific requirements, such as removing whitespace characters or handling non-ASCII characters.
* Utilizing `Array.prototype.map()` and `String.prototype.join()` to create a string representation of the array elements.

Keep in mind that these alternatives may require additional code and consideration to ensure optimal performance and compatibility with various browsers.

Related benchmarks:

args stringify vs join vs toString (version: 0)

Comparing performance of: stringify vs join vs toString

Created: one year ago by: Guest

Jump to the latest result

stringify

join

toString

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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