Benchmark: Lodash Chain vs &&

HTML Preparation code:


<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

Script Preparation code:

var data = Array(10000000).fill({ a: 'a', b: 1 });

Tests:

Chain
_.chain(data).filter(f => f.a === 'a').filter(f => f.b === 1).map(f => f.a).value()
Without chain
data.filter(f => f.a === 'a' && f.b === 1).map(f => f.a)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Chain
Without chain

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 26 days ago):

LLMs can make mistakes. Check important info.

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

**Benchmark Definition**

The benchmark definition json contains two main components:

1. **Script Preparation Code**: This code snippet initializes an array of 10,000,000 objects with two properties: `a` and `b`. The `data` variable is assigned this value.
2. **Html Preparation Code**: This code snippet includes the Lodash JavaScript library from a CDN, which will be used in the benchmark.

**Test Cases**

The benchmark definition contains two individual test cases:

1. **"Chain"`**:
This test case uses the Lodash `chain()` function to create a pipeline of operations on the `data` array.
	* The first filter (`_.chain(data).filter(f => f.a === 'a')`) filters out elements where `a` is not equal to `'a'`.
	* The second filter (`_.filter(f => f.b === 1)`) filters out elements where `b` is not equal to `1`.
	* The map function (`_.map(f => f.a)`) maps each element to its value for the property `a`.
	* The final `.value()` method returns the result of the entire pipeline.
2. **"Without chain"`**:
This test case uses a traditional JavaScript approach without Lodash's chaining functionality.
	* The first filter (`data.filter(f => f.a === 'a' && f.b === 1)`) filters out elements where `a` is not equal to `'a'` and `b` is not equal to `1`.
	* The second filter (`_.map(f => f.a)` is incorrect here, it should be `.map(f => f.a)`) maps each element to its value for the property `a`.

**Options Compared**

The benchmark compares two approaches:

1. **Lodash chaining**: This approach uses Lodash's utility functions to create a pipeline of operations on the `data` array.
2. **Traditional JavaScript filtering and mapping**: This approach uses native JavaScript methods (filter, map) without Lodash's chaining functionality.

**Pros and Cons**

* **Lodash Chaining**:
	+ Pros: More readable code, less chance of errors due to correct order of operations.
	+ Cons: Additional overhead due to the need to import and initialize the Lodash library, potential performance impact if not used efficiently.
* **Traditional JavaScript Filtering and Mapping**:
	+ Pros: No additional overhead, potentially faster execution since there is no unnecessary function call overhead.
	+ Cons: Less readable code, more chance of errors if the order of operations is incorrect.

**Library Usage**

The benchmark uses Lodash version 4.17.5. Lodash is a popular JavaScript library that provides a wide range of utility functions for tasks such as:

* Data manipulation (filter, map, reduce)
* String and array manipulation
* Object manipulation
* Functional programming utilities

In this case, Lodash's `chain()` function enables the use of a pipeline approach to filter and transform data in a more readable way.

**Special JS Feature or Syntax**

There are no special JavaScript features or syntax used in these test cases.

Latest run results:

Run details: (Test run date: 9 days ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/130.0.0.0 Safari/537.36 Edg/130.0.0.0

Browser/OS: Chrome 130 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
Chain	3.6 Ops/sec
Without chain	4.5 Ops/sec

Related benchmarks:

Lodash Chain vs && (version: 0)

Comparing performance of: Chain vs Without chain

Created: 3 years ago by: Guest

Jump to the latest result

Chain

Without chain

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 26 days ago):