Benchmark: Array.prototype.slice vs spread operator fix

Tests:

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

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Array.prototype.slice
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 and explain what's being tested.

**Benchmark Overview**

The benchmark, titled "Array.prototype.slice vs spread operator fix", compares the performance of two approaches for creating a new array from an existing one: the traditional `slice()` method and the ES6 spread operator (`[...]`).

**What is being tested?**

Two individual test cases are defined:

1. **Test Case 1: Array.prototype.slice**
	* The benchmark definition code uses the `slice()` method to create a new array from an existing array `params`. For example:
```javascript
var params = [ "hello", true, 7 ];
var other = params.slice();
```
This test case measures the performance of the `slice()` method.
2. **Test Case 2: Spread Operator**
	* The benchmark definition code uses the spread operator (`[...]`) to create a new array from an existing array `params`. For example:
```javascript
var params = [ "hello", true, 7 ];
var other = [ ...params ];
```
This test case measures the performance of the spread operator.

**Options Compared**

The benchmark compares two options:

1. **Traditional slice() method**
	* Pros: widely supported, simple to implement.
	* Cons: may have performance overhead due to its iterative nature and potential use of a loop.
2. **ES6 Spread Operator ([...] )**
	* Pros: more concise, potentially faster execution.
	* Cons: may have compatibility issues in older browsers or environments.

**Other Considerations**

When choosing between the traditional `slice()` method and the ES6 spread operator, consider the following:

* Compatibility: If you need to support older browsers or environments, the traditional `slice()` method might be a better choice.
* Code readability: The spread operator can make code more concise and readable in some cases.
* Performance: Benchmarking results may vary depending on the specific use case, platform, and browser.

**Library/Functionality Description**

In this benchmark, no external libraries or functions are used. However, it's worth noting that some JavaScript environments might have additional features or syntax that could affect performance, such as:

* `let` and `const` declarations (introduced in ECMAScript 2015)
* `class` syntax (introduced in ECMAScript 2015)
* Module imports and exports (introduced in ECMAScript 2015)

**Special JS Features/Syntax**

No special JavaScript features or syntax are used in this benchmark.

**Alternatives**

If you need to compare other array creation methods, consider the following alternatives:

1. **Array constructor**: `new Array(params.length)` vs `var other = new Array();`
2. **Array.from() method**: `var other = Array.from(params)`
3. **Map and Iterables**: Using `Map` or `Iterables` to create a new array from an existing one.

Keep in mind that the choice of alternative depends on your specific use case, performance requirements, and compatibility constraints.

Related benchmarks:

Array.prototype.slice vs spread operator fix (version: 0)

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

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

Created: 3 years ago by: Guest

Jump to the latest result

Array.prototype.slice

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):