Benchmark: js-yaml vs yaml-js

HTML Preparation code:

<script src="https://cdnjs.cloudflare.com/ajax/libs/js-yaml/3.12.0/js-yaml.min.js"></script>
<script src="https://cdnjs.cloudflare.com/ajax/libs/yamljs/0.3.0/yaml.min.js"></script>

Script Preparation code:

var yamlString = 'key1: val1\nkey2: 7';

Tests:

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

Historical Performance Data aggregated from 27 community runs

Desktop Results:

Chrome 21 runs

js-yaml

571K/s

yaml-js

318K/s

Fastest: js-yaml (1.8x faster)

View exact numbers

✓ js-yaml: 570,832 ops/sec
• yaml-js: 317,640 ops/sec

Firefox 6 runs

js-yaml

497K/s

yaml-js

267K/s

Fastest: js-yaml (1.9x faster)

View exact numbers

✓ js-yaml: 496,659 ops/sec
• yaml-js: 267,000 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
yaml-js
js-yaml

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 3 months ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:151.0) Gecko/20100101 Firefox/151.0

Browser/OS: Firefox 151 on Windows

View result in a separate tab

js-yaml

884K/s

yaml-js

548K/s

View exact numbers

Test name	Executions per second
✓ js-yaml	883,647 Ops/sec
yaml-js	547,937 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's dive into the world of JavaScript microbenchmarks!

**What is tested?**

The provided benchmark tests two JavaScript libraries, js-yaml and yaml-js, which are used to parse YAML (YAML Ain't Markup Language) strings. The test case creates a YAML string, loads it using each library, and measures the execution time.

**Options compared:**

There are two options being compared:

1. **js-yaml**: A JavaScript implementation of the YAML specification, providing a safe way to parse YAML data.
2. **yaml-js**: A JavaScript wrapper around the pyyaml library (originally from Python), which also parses YAML data but with some differences in behavior.

**Pros and cons of each approach:**

* **js-yaml**:
	+ Pros:
		- Strictly adheres to the YAML specification, ensuring consistency across different versions.
		- Provides a safe way to parse YAML data, reducing the risk of security vulnerabilities.
	+ Cons:
		- Might be slower due to the additional overhead of implementing the full YAML specification.
* **yaml-js**:
	+ Pros:
		- Faster execution time compared to js-yaml, likely due to optimized implementation and caching mechanisms.
		- Provides a more modern and streamlined parsing experience.
	+ Cons:
		- Might not be as strict in its adherence to the YAML specification, which could lead to inconsistencies across different versions.

**Library considerations:**

* **js-yaml**: A pure JavaScript implementation of the YAML specification. It's maintained by Ben Everard and is widely regarded as one of the most comprehensive implementations available.
* **yaml-js**: A JavaScript wrapper around the pyyaml library. While it provides a good parsing experience, its behavior might differ from the original Python version.

**Special JavaScript features or syntax:**

None are explicitly mentioned in this benchmark, but keep in mind that other benchmarks might involve testing specific JavaScript features like async/await, Promises, or ES6+ syntax.

**Other alternatives:**

If you're looking for alternative YAML parsers in JavaScript, some options include:

* **yaml-loader**: A Node.js module that loads YAML files and provides a simple API.
* **yaml2json**: A lightweight YAML parser that converts YAML data to JSON.
* **yaml-js-alien**: Another JavaScript wrapper around the pyyaml library, with slightly different behavior compared to yaml-js.

In summary, this benchmark compares two popular JavaScript libraries for parsing YAML strings: js-yaml and yaml-js. While both provide good results, js-yaml is a more strict implementation that ensures consistency across different versions, while yaml-js offers faster execution times at the cost of some flexibility in its adherence to the YAML specification.

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

Comparing performance of: `yaml-js vs js-yaml`

Created: 5 years ago by: Registered User

Go to the latest result

yaml-js

js-yaml

Historical Performance Data aggregated from 27 community runs

Desktop Results:

Chrome 21 runs

Firefox 6 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

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

Comparing performance of: yaml-js vs js-yaml

Created: 5 years ago by: Registered User

Go to the latest result

yaml-js

js-yaml

Historical Performance Data aggregated from 27 community runs

Desktop Results:

Chrome 21 runs

Firefox 6 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

Related benchmarks

Comparing performance of: `yaml-js vs js-yaml`