Benchmark: Get first object value using lodash.flatMap, Object.values or Object.keys

HTML Preparation code:

<script src="https://cdn.jsdelivr.net/lodash/4.17.21/lodash.min.js"></script>

Script Preparation code:

var x = {};
for (let i = 0; i< 100000; i++) {
x[i] = {a: i, b: i+1, c: i+2};
}

Tests:

lodash.flatMap
_.flatMap(x)[0]
Object.values
Object.values(x)[0]
Object.keys
Object[Object.keys(x)[0]]

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
lodash.flatMap
Object.values
Object.keys

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/122.0.0.0 YaBrowser/24.4.0.0 Safari/537.36

Browser/OS: Yandex Browser 24 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
lodash.flatMap	180.8 Ops/sec
Object.values	7263.8 Ops/sec
Object.keys	480.7 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 MeasureThat.net and analyze the provided benchmark.

**Benchmark Overview**

The benchmark compares three ways to access the first object value from an array-like object `x`:

1. Using Lodash's `flatMap` function
2. Using `Object.values`
3. Using `Object.keys`

**Library: Lodash**

Lodash is a popular JavaScript utility library that provides various functions for tasks such as functional programming, string manipulation, and more. In this benchmark, we're using the `flatMap` function to flatten an array-like object into an array.

The script preparation code creates an array-like object `x` with 100,000 properties, each containing three values: `a`, `b`, and `c`. The HTML preparation code includes a link to the Lodash CDN, ensuring that the `flatMap` function is loaded.

**Approaches Compared**

Here's a brief overview of each approach:

1. **Lodash `flatMap`**: This method flattens the array-like object into an array, allowing us to access the first element using `[0]`. The `flatMap` function returns a new array containing the flattened values.
2. **`Object.values`**: This method returns an array of values from an object or array-like object, ordered by their property value strings (i.e., the string keys). We can access the first value using `[0]`.
3. **`Object.keys`**: Similar to `Object.values`, but it returns an array of the object's keys as strings. To access the first key-value pair, we use `Object[Object.keys(x)[0]]`.

**Pros and Cons**

Here are some pros and cons for each approach:

1. **Lodash `flatMap`**:
	* Pros: Efficient and concise way to flatten an array-like object.
	* Cons: Requires Lodash to be included in the script, which might not be desirable for all projects.
2. **`Object.values`**:
	* Pros: No external dependencies required, as it's a built-in JavaScript method.
	* Cons: Might require additional processing steps to extract the first value from the array of values.
3. **`Object.keys`**:
	* Pros: Also no external dependencies required and doesn't require iterating over the entire array.
	* Cons: Similar to `Object.values`, might need additional processing steps to access the first key-value pair.

**Special JavaScript Features or Syntax**

None are used in this benchmark, as it's focused on comparing simple method calls.

**Other Considerations**

The benchmark assumes that the input object `x` is a valid array-like object. In practice, you may want to add error handling or edge cases to ensure the benchmark behaves correctly for invalid inputs.

If you were to modify this benchmark to compare additional methods or libraries, consider using a similar structure and format to make it easier for maintainers and users to understand the comparison.

**Alternatives**

Other alternatives for comparing array-like object accessors could include:

1. Using `for...of` loop to iterate over the values or keys of the object.
2. Comparing `Array.prototype.forEach` with other iteration methods like `while` loops or recursive functions.
3. Exploring alternative libraries like Ramda or Liskov's own implementation for array-like objects.

These alternatives might offer different trade-offs in terms of performance, readability, and complexity, making them worth investigating depending on your specific use case.

Related benchmarks:

Get first object value using lodash.flatMap, Object.values or Object.keys (version: 0)

Comparing performance of: lodash.flatMap vs Object.values vs Object.keys

Created: one year ago by: Guest

Jump to the latest result

lodash.flatMap

Object.values

Object.keys

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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