Benchmark: Array.prototype.concat vs spread operator 12345

Tests:

Array.prototype.concat
var params = [ "hello", true, 7 ]; var other = [ 1, 2 ].concat(params);
spread operator
var params = [ "hello", true, 7 ] var other = [ 1, 2, ...params ]

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Suite status: <idle, ready to run>

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Test case name	Result
Array.prototype.concat
spread operator

Fastest: N/A

Slowest: N/A

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

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

**Benchmark Definition**

The benchmark compares two approaches for concatenating arrays in JavaScript:

1. The traditional `Array.prototype.concat()` method.
2. The new ES6 spread operator (`...`).

Both methods are being compared, but with some differences in their usage. The traditional approach uses the `concat()` method, while the spread operator is used to unpack an array and then concatenate it with another array.

**Pros and Cons of Each Approach**

1. **Traditional `Array.prototype.concat()` method:**
	* Pros:
		+ Wide browser support (not dependent on ES6 features).
		+ Well-documented and widely understood.
	* Cons:
		+ Can be slower due to the overhead of calling a method on an array.
2. **ES6 Spread Operator (`...`):**
	* Pros:
		+ Faster execution, as it's just an array unpacking operation.
		+ More modern and efficient way to concatenate arrays.
	* Cons:
		+ Less widely supported in older browsers (not ES5 compatible).

**Library Used**

The benchmark doesn't explicitly mention any libraries being used. However, the use of `Array.prototype.concat()` suggests that the test is verifying its implementation.

**Special JS Feature or Syntax**

This benchmark doesn't use any special JavaScript features or syntax beyond the spread operator. It's designed to compare two common array concatenation methods in a straightforward way.

**Other Alternatives**

If you were to replace one of the approaches, you could consider using other methods for array concatenation, such as:

* Using the `Array.prototype.push()` method with an array literal (e.g., `[...].push(...)`).
* Using a library like Lodash's `concat` function.
* Using a polyfill or transpiler to enable ES6 features in older browsers.

Keep in mind that these alternatives might have different performance characteristics and use cases, depending on the specific requirements of your project.

Related benchmarks:

Array.prototype.concat vs spread operator 12345 (version: 0)

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

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

Created: 7 years ago by: Guest

Jump to the latest result

Array.prototype.concat

spread operator

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):