Benchmark: JSON.parse vs string.split 2

Script Preparation code:

var array = ["test1", "test2"]
var str = JSON.stringify(array);

Tests:

JSON.parse
JSON.parse(str);
String.split
str.split(',')

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
JSON.parse
String.split

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/110.0.0.0 Safari/537.36 Edg/110.0.1587.63

Browser/OS: Chrome 110 on Windows

View result in a separate tab

Test name	Executions per second
JSON.parse	3125904.2 Ops/sec
String.split	5133933.0 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the provided JSON benchmark definition and explain what's being tested.

**Benchmark Definition:**

The test compares two approaches for parsing a string:

1. `JSON.parse(str)`
2. `str.split(',')`

**Options Compared:**

The two options are compared in terms of their execution speed, measured in executions per second (ExecutionsPerSecond).

**Pros and Cons:**

1. **JSON.parse(str)**:
	* Pros:
		+ Can handle nested JSON structures more efficiently than string splitting.
		+ Often faster for parsing simple strings.
	* Cons:
		+ May have performance issues with complex or deeply nested JSON data.
2. **str.split(',')**:
	* Pros:
		+ Can be used to split a string into an array, which can be useful in certain scenarios.
	* Cons:
		+ Not designed for parsing JSON data; it's a simple string splitting algorithm.

**Library:**

None. This test does not use any external library or framework.

**Special JavaScript Feature/Syntax:**

There are no special JavaScript features or syntax mentioned in the benchmark definition. However, note that `JSON.parse` uses the ECMAScript 5 JSON parsing syntax (`JSON.parse()`) which may be relevant to modern JavaScript engines.

**Other Alternatives:**

If you needed to parse a string in JavaScript, other alternatives might include:

* Using a regular expression to split the string
* Implementing your own custom parsing algorithm
* Using a third-party library or framework that provides JSON parsing functionality

However, it's worth noting that `JSON.parse` is generally the recommended way to parse JSON data in modern JavaScript, and it's widely supported by most browsers and Node.js implementations.

**Benchmark Preparation Code:**

The script preparation code creates an array `array` with two elements, which is then stringified using `JSON.stringify()` to produce a string `str`. This string will be used as input for the benchmarking tests.

**Individual Test Cases:**

The test cases compare the execution speed of `JSON.parse(str)` and `str.split(',')`. The first test case uses `JSON.parse(str)`, while the second test case uses `str.split(',')`.

In the provided benchmark results, Chrome 110 executes `str.split(',')` faster than `JSON.parse(str)`, with an executions per second value of 5133933.0 compared to 3125904.25 for `JSON.parse(str)`.

Related benchmarks:

JSON.parse vs string.split 2 (version: 0)

Comparing performance of: JSON.parse vs String.split

Created: 3 years ago by: Guest

Jump to the latest result

JSON.parse

String.split

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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