Benchmark: Object.entries vs lodash toPairs

HTML Preparation code:

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

Tests:

Object.entries
var a = {a:1, b:2, c:3}; var b = Object.entries(a);
_.toPairs
var a = {a:1, b:2, c:3}; var b = _.toPairs(a);

Historical Performance Data aggregated from 31 community runs

Desktop Results:

Chrome 31 runs

_.toPairs

8.3M/s

Object.entries

6.8M/s

Fastest: _.toPairs (1.2x faster)

View exact numbers

✓ _.toPairs: 8,314,413 ops/sec
• Object.entries: 6,772,420 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
Object.entries
_.toPairs

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/138.0.0.0 Safari/537.36

Browser/OS: Chrome 138 on Mac OS X 10.15.7

View result in a separate tab

_.toPairs

16.1M/s

Object.entries

10.1M/s

View exact numbers

Test name	Executions per second
✓ _.toPairs	16,118,042 Ops/sec
Object.entries	10,106,595 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 benchmark and explain what's being tested.

**What is being tested?**

The provided JSON represents a JavaScript microbenchmark test case that compares the performance of two approaches: `Object.entries` (built-in JavaScript method) and `_toPairs` from the Lodash library. The test creates an object with three properties (`a`, `b`, and `c`) and then uses each approach to extract its values as arrays.

**Options being compared**

There are only two options being compared:

1. **Object.entries**: A built-in JavaScript method that returns an array of a given object's key-value pairs.
2. **_.toPairs` from Lodash library**: A utility function from the popular JavaScript utility library Lodash that converts an object into an array of its key-value pairs.

**Pros and Cons**

Here are some pros and cons of each approach:

1. **Object.entries**
	* Pros:
		+ Built-in method, so no additional dependencies required.
		+ Compact and efficient implementation.
	* Cons:
		+ May not be optimized for performance in certain scenarios (e.g., large objects).
2. **_.toPairs from Lodash library**
	* Pros:
		+ More flexible and customizable than Object.entries.
		+ Can handle more complex object structures (e.g., nested objects, arrays).
	* Cons:
		+ Requires an additional dependency on the Lodash library.
		+ May have a slight performance overhead due to the function call.

**Library: Lodash**

Lodash is a popular JavaScript utility library that provides a wide range of functions for tasks such as:

* Array manipulation
* Object manipulation
* String manipulation
* Function composition

The `_.toPairs` function, in particular, is designed to convert an object into an array of its key-value pairs, making it a useful tool for iteration and transformation.

**JavaScript feature or syntax**

There are no special JavaScript features or syntax being used in this benchmark. The code is plain vanilla JavaScript.

**Other alternatives**

If you wanted to compare other approaches, some possible alternatives could be:

* Using the `for...in` loop with `Object.keys()` to iterate over an object's properties.
* Implementing a custom iterator function using `Symbol.iterator`.
* Using another library or framework-specific iteration mechanism (e.g., React's `useCallback`, Vue's `computed` property).

Keep in mind that each approach has its own trade-offs and may not be suitable for every use case. The choice of which method to use ultimately depends on the specific requirements and constraints of your project.

Object.entries vs lodash toPairs (version: 0)

Comparing performance of: `Object.entries vs _.toPairs`

Created: 6 years ago by: Guest

Go to the latest result

Object.entries

_.toPairs

Historical Performance Data aggregated from 31 community runs

Desktop Results:

Chrome 31 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

Object.entries vs lodash toPairs (version: 0)

Comparing performance of: Object.entries vs _.toPairs

Created: 6 years ago by: Guest

Go to the latest result

Object.entries

_.toPairs

Historical Performance Data aggregated from 31 community runs

Desktop Results:

Chrome 31 runs

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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

Comparing performance of: `Object.entries vs _.toPairs`