Benchmark: JSON.parse vs string.splitds

Script Preparation code:

var array = new Array(5).fill('1');
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; rv:121.0) Gecko/20100101 Firefox/121.0

Browser/OS: Firefox 121 on Windows

View result in a separate tab

Test name	Executions per second
JSON.parse	5901454.0 Ops/sec
String.split	8730421.0 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 benchmark and explain what's being tested.

**Benchmark Purpose**

The benchmark is comparing the performance of two approaches: string splitting using `str.split(',')` and JSON parsing using `JSON.parse(str)`.

**String Splitting (`str.split(',')`)**

The script preparation code creates an array with 5 elements, all filled with the value '1'. The resulting string is then split into individual elements by commas. This test measures the performance of this simple string manipulation technique.

Pros:

* Easy to implement and understand
* Suitable for small strings or simple data processing tasks
* Fast execution due to native string splitting mechanism

Cons:

* May not be efficient for large datasets or complex string manipulation tasks
* Can be affected by factors like string length, delimiter complexity, and performance optimizations

**JSON Parsing (`JSON.parse(str)`)**

The script preparation code creates an array with 5 elements, all filled with the value '1', which is then converted to a JSON string using `JSON.stringify(array)`. This test measures the performance of parsing this JSON string.

Pros:

* Wide adoption and good performance in modern browsers
* Robust error handling and data validation
* Can handle complex data structures like arrays, objects, and nested JSON

Cons:

* May have slower execution compared to native string splitting due to added overhead
* Requires a valid JSON input, which may lead to parsing errors or false positives

**Library Usage**

In this benchmark, the `JSON` library is used. The `JSON.parse()` function takes a JSON string as input and returns an object representing the parsed data.

Pros:

* Standardized and widely supported API for working with JSON data
* Robust error handling and data validation

Cons: None notable in this context.

**Special JavaScript Feature**

There are no special JavaScript features or syntax mentioned in this benchmark. It's a straightforward test of string manipulation techniques.

**Alternatives to String Splitting**

If `str.split(',')` is not efficient enough for your use case, consider the following alternatives:

1. **RegEx**: Use regular expressions (RegEx) with the `RegExp.prototype.exec()` method to split strings based on specific patterns.
2. **Array.prototype.reduce()`: Apply a reduce function to an array of string elements to concatenate and split them as needed.
3. **Custom implementation**: Write your own custom function for splitting or concatenating strings using bitwise operations, character iteration, or other efficient techniques.

**Alternatives to JSON Parsing**

If `JSON.parse(str)` is not the best fit, consider the following alternatives:

1. **DOM parser**: Use a DOM-based approach like `XMLSerializer` or `DOMParser` to parse JSON data.
2. **Custom implementation**: Implement your own parsing logic using bitwise operations, character iteration, or other efficient techniques.
3. **Third-party libraries**: Utilize specialized libraries for parsing specific types of data, such as CSV or XML files.

Keep in mind that these alternatives may have different performance characteristics and might not be suitable for all use cases.

Related benchmarks:

JSON.parse vs string.splitds (version: 0)

Comparing performance of: JSON.parse vs String.split

Created: one year 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):