Benchmark: spread concat merge

HTML Preparation code:

<script src='https://cdnjs.cloudflare.com/ajax/libs/jquery/3.3.1/jquery.js'></script>

Tests:

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

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
merge (jquery)
spread
concat prototype

Fastest: N/A

Slowest: N/A

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

LLMs can make mistakes. Check important info.

I'd be happy to help you understand the JavaScript microbenchmarking test on MeasureThat.net.

**Benchmark Definition and Script Preparation Code**

The benchmark definition is a JSON object that represents three different approaches to merge or spread arrays in JavaScript:

1. `merge (jquery)`: This approach uses jQuery's `$merge` method to concatenate two arrays.
2. `spread`: This approach uses the `...` operator (also known as "spread operator") to expand an array into multiple arguments.
3. `concat prototype`: This approach uses the `Array.prototype.concat()` method to concatenate two arrays.

The script preparation code is not provided, but it's implied that each test case has a separate JavaScript file or snippet that defines the variables and functions used in the benchmark.

**Individual Test Cases**

Each test case represents one of the three approaches mentioned above. Let's break down each test case:

1. `merge (jquery)`:
	* The benchmark definition uses jQuery's `$merge` method to concatenate two arrays: `[1, 2]` and `["hello", true, 7]`.
	* This approach is specific to jQuery and relies on the library being loaded from a CDN.
2. `spread`:
	* The benchmark definition uses the `...` operator (spread operator) to expand an array into multiple arguments: `[1, 2]`, `"hello"`, `true`, and `7`.
	* This approach is a built-in JavaScript feature introduced in ECMAScript 2015.
3. `concat prototype`:
	* The benchmark definition uses the `Array.prototype.concat()` method to concatenate two arrays: `[1, 2]` and `["hello", true, 7]`.
	* This approach relies on the existence of an `Array.prototype.concat()` method.

**Pros and Cons**

Here's a brief overview of the pros and cons for each approach:

1. `merge (jquery)`:
	* Pros: Simple to implement, works with jQuery version 1.x.
	* Cons: Requires loading jQuery library, may not work in older browsers or environments without jQuery.
2. `spread`:
	* Pros: Built-in JavaScript feature, efficient, and easy to implement.
	* Cons: May not work in very old browsers or environments that don't support ECMAScript 2015.
3. `concat prototype`:
	* Pros: Widespread support across modern browsers and environments, reliable implementation.
	* Cons: May be slower than spread operator due to method call overhead.

**Other Considerations**

When evaluating the performance of these approaches, keep in mind:

* Modern browsers generally have good support for ECMAScript 2015 features like the spread operator.
* jQuery's `$merge` method may not be as efficient as other approaches due to its specific implementation details.
* The `Array.prototype.concat()` method can be slower than using the spread operator due to method call overhead.

**Other Alternatives**

If you need alternative approaches for merging or spreading arrays, consider:

1. Using `Array.prototype.push()` instead of concatenation: This approach modifies the original array and can be more efficient.
2. Using a custom implementation with `for` loops: This approach can provide fine-grained control over the merge operation but may be slower than built-in methods.

Keep in mind that performance optimizations should always consider the specific use case, target audience, and trade-offs between ease of implementation, maintainability, and execution speed.

Latest run results:

Run details: (Test run date: 4 years ago)

User agent: Mozilla/5.0 (Linux; Android 9; SM-A505W) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/80.0.3987.87 Mobile Safari/537.36

Browser/OS: Chrome Mobile 80 on Android

View result in a separate tab

Test name	Executions per second
merge (jquery)	1249361.4 Ops/sec
spread	8156788.0 Ops/sec
concat prototype	2547011.2 Ops/sec

Related benchmarks:

spread concat merge (version: 0)

Comparing performance of: merge (jquery) vs spread vs concat prototype

Created: 4 years ago by: Guest

Jump to the latest result

merge (jquery)

spread

concat prototype

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

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