Benchmark: JSON.parse() vs. js-yaml

HTML Preparation code:

<script src="https://cdnjs.cloudflare.com/ajax/libs/js-yaml/3.12.0/js-yaml.min.js"></script>

Script Preparation code:

var jsonString = '{"key1": "val1", "key2": 7}';
var yamlString = 'key1: val1\nkey2: 7';

Tests:

JSON.parse()
var dummy = JSON.parse(jsonString);
js-yaml
var dummy = jsyaml.safeLoad(yamlString);

Historical Performance Data aggregated from 5 community runs

Desktop Results:

Chrome 5 runs

JSON.parse()

4.6M/s

js-yaml

904K/s

Fastest: JSON.parse() (5.1x faster)

View exact numbers

✓ JSON.parse(): 4,618,290 ops/sec
• js-yaml: 903,689 ops/sec

Results show median performance across all community submissions. Run this benchmark yourself to verify on your device.

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
JSON.parse()
js-yaml

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Linux; Android 10; K) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/138.0.0.0 Mobile Safari/537.36 EdgA/138.0.0.0

Browser/OS: Chrome Mobile 138 on Android

View result in a separate tab

JSON.parse()

5.2M/s

js-yaml

749K/s

View exact numbers

Test name	Executions per second
✓ JSON.parse()	5,207,744 Ops/sec
js-yaml	749,164 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the provided JSON benchmark definition and test cases to understand what's being tested.

**Benchmark Definition**

The `Script Preparation Code` section defines two JavaScript variables:

* `jsonString`: a JSON string containing an object with two key-value pairs: `"key1": "val1"` and `"key2": 7`.
* `yamlString`: a YAML string containing the same data as `jsonString`, but in YAML format.

The `Html Preparation Code` section includes a script tag that loads the `js-yaml` library, which is used to parse the `yamlString`.

**Options Compared**

Two options are being compared:

1. **JSON.parse()**: This method parses a JSON string into a JavaScript object.
2. **js-yaml.safeLoad()**: This method parses a YAML string into a JavaScript object using the `js-yaml` library.

**Pros and Cons of Each Approach**

* **JSON.parse()**:
	+ Pros: widely supported, efficient, and relatively simple to implement.
	+ Cons: can be slower for large JSON strings due to its simplicity, and may not handle all edge cases (e.g., nested objects with circular references).
* **js-yaml.safeLoad()**:
	+ Pros: handles more complex YAML data structures, including arrays and hashes, and provides better error handling than `JSON.parse()`.
	+ Cons: requires the `js-yaml` library to be loaded, which may add overhead, and its performance may be slower due to the additional complexity.

**Library: js-yaml**

The `js-yaml` library is a JavaScript implementation of the YAML data serialization format. It provides methods for parsing and generating YAML data, including `safeLoad()` (used in this benchmark) and other functions like `dump()` and `schema()`.

**Special JS Feature/Syntax**

This benchmark does not use any special JavaScript features or syntax that are specific to a particular browser or version of JavaScript.

**Other Alternatives**

If you want to compare the performance of different JSON parsing libraries, you could also consider adding benchmarks for:

* **fast-json-parser**: A high-performance JSON parser library.
* **json-stringify-safe**: A lightweight JSON stringifier library that can be used for both parsing and generating JSON data.
* **xml2js** (for YAML-like data): If you want to compare the performance of different libraries for parsing YAML-like data, you could consider adding a benchmark for `xml2js`, which is a popular JavaScript library for parsing XML and YAML data.

Keep in mind that each alternative has its own pros and cons, and the choice of library ultimately depends on your specific use case and requirements.

JSON.parse() vs. js-yaml (version: 0) Benchmark.js

Comparing performance of: `JSON.parse() vs js-yaml`

Created: 7 years ago by: Guest

Go to the latest result

JSON.parse()

js-yaml

Historical Performance Data aggregated from 5 community runs

Desktop Results:

Chrome 5 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

JSON.parse() vs. js-yaml (version: 0) Benchmark.js

Comparing performance of: JSON.parse() vs js-yaml

Created: 7 years ago by: Guest

Go to the latest result

JSON.parse()

js-yaml

Historical Performance Data aggregated from 5 community runs

Desktop Results:

Chrome 5 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

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Comparing performance of: `JSON.parse() vs js-yaml`