Benchmark: concat vs spread vs push v2

Tests:

Array.prototype.concat
var params = [ "hello", true, 7 ]; var other = [ 1, 2 ]; other = other.concat( params );
iterate spread operator
var params = [ "hello", true, 7 ]; var other = [ 1, 2 ]; params.forEach( elem => { other = [ ...other, elem ]; } );
iterate push
var params = [ "hello", true, 7 ]; var other = [ 1, 2 ]; params.forEach( elem => { other.push( elem ); } );

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Array.prototype.concat
iterate spread operator
iterate push

Fastest: N/A

Slowest: N/A

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

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and its test cases.

**What is being tested:**

The benchmark tests three different approaches to concatenate or add elements to an array:

1. **ES6 Spread Operator (`...`)**: This operator creates a new array by spreading the elements of another array.
2. **`concat()` method**: A built-in JavaScript method that concatenates two arrays.
3. **`push()` method with iteration**: In this approach, the `push()` method is used to add elements to an array while iterating over another array.

**Options being compared:**

The benchmark compares the performance of these three approaches:

* ES6 Spread Operator (`...`)
* `concat()` method
* `push()` method with iteration

**Pros and Cons of each approach:**

1. **ES6 Spread Operator (`...`)**:
	* Pros:
		+ Creates a new array, which can be more efficient for large datasets.
		+ More readable code.
	* Cons:
		+ Requires JavaScript 7 or later to work.
2. **`concat()` method**:
	* Pros:
		+ Built-in method, so it's available on all browsers.
		+ Can be used with other methods (e.g., `Array.prototype.reduce()`).
	* Cons:
		+ Creates a new array, which can be memory-intensive for large datasets.
3. **`push()` method with iteration**:
	* Pros:
		+ More control over the addition of elements to the original array.
		+ Can be more efficient for small datasets or arrays.
	* Cons:
		+ Requires manual iteration, which can be less readable.

**Library usage:**

None of the test cases use any external libraries. They only rely on built-in JavaScript methods and features.

**Special JS feature/syntax:**

The benchmark uses the ES6 Spread Operator (`...`), which is a relatively new syntax introduced in ECMAScript 2015 (ES6). It's supported by most modern browsers, but not all older ones.

**Benchmark preparation code:**

The `Script Preparation Code` and `Html Preparation Code` fields are empty, suggesting that the benchmark doesn't require any specific script or HTML setup to run. The test cases only rely on standard JavaScript methods and features.

**Alternatives:**

If you want to explore alternative approaches for concatenating arrays in JavaScript, consider:

* Using a loop with `Array.prototype.push()` instead of iterating over the array.
* Using `Array.prototype.reduce()` to concatenate arrays.
* Using other libraries or frameworks that provide optimized array concatenation methods (e.g., Lodash).

Keep in mind that these alternatives might have their own trade-offs and performance implications, so be sure to test them thoroughly before making a decision.

Related benchmarks:

concat vs spread vs push v2 (version: 0)

Compare ES6 spread operator with push() and concat() methods

Comparing performance of: Array.prototype.concat vs iterate spread operator vs iterate push

Created: 3 years ago by: Guest

Jump to the latest result

Array.prototype.concat

iterate spread operator

iterate push

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

No previous run results

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