Benchmark: Array.prototype.concat vs spread operator122

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>

Previous results

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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**Overview**

MeasureThat.net is a website that allows users to create and run JavaScript microbenchmarks to compare the performance of different approaches. In this case, we have two individual test cases: `Array.prototype.concat` and the spread operator.

**Test Cases**

The first test case measures the performance of the traditional `concat()` method for concatenating arrays:

```javascript
var params = [ "hello", true, 7 ];
var other = [ 1, 2 ].concat(params);
```

The second test case measures the performance of the spread operator (introduced in ES6) for concatenating arrays:

```javascript
var params = [ "hello", true, 7 ];
var other = [ 1, 2, ...params ];
```

**Options Compared**

In this benchmark, two options are compared:

1. **Traditional `concat()` method**: This is the old way of concatenating arrays in JavaScript.
2. **Spread operator**: A new feature introduced in ES6 that allows for more concise and expressive array concatenation.

**Pros and Cons**

**Traditional `concat()` Method:**

* Pros:
	+ Widely supported by older browsers
	+ Easy to read and understand
* Cons:
	+ Can be slower than the spread operator due to the overhead of calling a function with multiple arguments

**Spread Operator:**

* Pros:
	+ Faster execution time compared to the traditional `concat()` method
	+ More concise and expressive syntax
	+ Widely supported by modern browsers
* Cons:
	+ May not work in older browsers that do not support ES6 features

**Library Used (if any)**

In this benchmark, there is no explicit library used. However, it's worth noting that the spread operator relies on the `...` syntax, which is a feature of JavaScript and not a library.

**Special JS Feature or Syntax**

The spread operator (`...`) is a special syntax introduced in ES6, allowing for more concise array concatenation. It's enabled by default in modern browsers, but may need to be explicitly enabled in older browsers.

**Other Alternatives**

If you wanted to measure the performance of other approaches, here are some alternatives:

1. **Using `Array.prototype.push()`**: This method modifies the original array and can be faster than concatenating a new array.
2. **Using `Array.prototype.join()`**: This method joins an array into a string using a delimiter, but can also be used for array concatenation in certain situations.

Keep in mind that these alternatives may not provide a direct comparison to the traditional `concat()` method and the spread operator, as they have different use cases and performance characteristics.

Related benchmarks:

Array.prototype.concat vs spread operator122 (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):