Benchmark: Array.prototype.concat vs spread operator 2000

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 dive into the world of MeasureThat.net and explore what's being tested in this benchmark.

**Overview**

The provided JSON represents two individual test cases, comparing the performance of the traditional `concat()` method with the new ES6 spread operator (`...`) on an array of strings, a boolean value, and an integer. The benchmark is designed to measure which approach performs better in terms of execution speed.

**Options being compared**

There are two options being compared:

1. **Array.prototype.concat**: The traditional method for concatenating arrays.
2. **Spread operator (`...`)**: The new ES6 syntax for spreading the elements of an array into a new array.

**Pros and Cons of each approach**

1. **Array.prototype.concat**:
	* Pros:
		+ Widely supported and well-established.
		+ Easy to understand and use, especially for developers familiar with traditional JavaScript.
	* Cons:
		+ Can be slower than the spread operator due to its implementation details (e.g., creating a new array object).
2. **Spread operator (`...`)**:
	* Pros:
		+ Faster execution speed due to its optimized implementation in modern browsers.
		+ More concise and expressive code.
	* Cons:
		+ Less widely supported than the traditional `concat()` method (although it's still a relatively new feature).
		+ May require more time for older developers or those unfamiliar with ES6 syntax.

**Other considerations**

When using the spread operator, consider the following:

* **Performance**: As mentioned earlier, the spread operator is generally faster than the traditional `concat()` method.
* **Code readability**: While the spread operator can be more concise, it may not always be easier to read and understand, especially for developers unfamiliar with ES6 syntax.

**Library usage**

There are no external libraries being used in these test cases. The benchmarks rely solely on native JavaScript functionality.

**Special JS features or syntax**

The only special feature being tested is the spread operator (`...`), which was introduced in ES6 (ECMAScript 2015). This allows for a more concise way of spreading array elements into a new array.

**Alternative approaches**

If you're looking to optimize array concatenation, consider using:

1. **Array.prototype.push()**: Instead of creating a new array, you can add elements to the end of an existing array using `push()`.
2. **Typed arrays**: For large datasets, using typed arrays (e.g., `Uint8Array`) can provide better performance and efficiency.

Keep in mind that these alternatives may not be as concise or expressive as the spread operator, but they can offer performance benefits for specific use cases.

Related benchmarks:

Array.prototype.concat vs spread operator 2000 (version: 0)

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

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

Created: 3 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):