Benchmark: reduce.concat() vs flat() 2

Tests:

reduce + Array.prototype.concat
var params = [[ 1, 2 ], [ "hello", true, 7 ]]; var other = params.reduce((acc, val) => acc.concat(val), []);
Array.prototype.flat
var params = [[1, 2 ], [ "hello", true, 7 ]]; var other = params.flat();

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
reduce + Array.prototype.concat
Array.prototype.flat

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 5 months ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/125.0.0.0 Safari/537.36

Browser/OS: Chrome 125 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
reduce + Array.prototype.concat	6992946.5 Ops/sec
Array.prototype.flat	4308100.0 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and explain what's being tested.

**Benchmark Definition**

The benchmark is comparing two approaches for concatenating arrays in JavaScript:

1. The traditional `concat()` method (old way).
2. A new ES6 spread operator (`...`) for flattening arrays (new way).

**Options Compared**

* Old approach: Using `Array.prototype.concat()` to concatenate arrays.
* New approach: Using the ES6 spread operator (`...`) to flatten arrays.

**Pros and Cons of Each Approach**

**Old Approach (concat())**

Pros:

* Widely supported by older browsers and JavaScript versions.
* Easy to understand and implement.

Cons:

* Can be slower than modern approaches due to its iterative nature.
* May lead to memory issues if not handled correctly.

**New Approach (ES6 Spread Operator)**

Pros:

* Faster execution speed due to its vectorized operation.
* More efficient memory usage.
* Modern and widely adopted by most browsers and JavaScript versions.

Cons:

* Requires support for ES6 features, which may not be available in older browsers or JavaScript versions.
* Less intuitive than traditional `concat()` method for some developers.

**Library/Tool Used**

The benchmark uses the `reduce()` method to concatenate arrays. This is a built-in JavaScript function that applies a reduction operation (in this case, concatenation) to an array. The `flat()` method is also used, which is a more modern array flattening function introduced in ECMAScript 2019.

**Special JS Feature/ Syntax**

The benchmark uses the ES6 spread operator (`...`) for flattening arrays, which is a new syntax introduced in JavaScript ES6. This feature allows for concise and expressive way to flatten arrays.

**Other Alternatives**

If you need to concatenate or flatten arrays in JavaScript, other alternatives include:

* Using `Array.prototype.push()` and `Array.prototype.concat()`
* Using `Array.prototype.splice()` and `Array.prototype.concat()`
* Using a library like Lodash (`_.concat()`) or Ramda (`ramda.concat()`)
* Using a custom implementation using loops or recursion.

Note that the choice of approach depends on the specific use case, performance requirements, and compatibility with different browsers and JavaScript versions.

Related benchmarks:

reduce.concat() vs flat() 2 (version: 0)

Compare the new ES6 spread operator with the traditional concat() method

Comparing performance of: reduce + Array.prototype.concat vs Array.prototype.flat

Created: 5 months ago by: Guest

Jump to the latest result

reduce + Array.prototype.concat

Array.prototype.flat

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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