Benchmark: concat string vs array push

Script Preparation code:

var arr = [];
var mxname = 'mxname';

Tests:

concat string
'test string' + ' ' + mxname;
array push
arr.push(mxname);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
concat string
array push

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 25 days ago):

LLMs can make mistakes. Check important info.

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

**Benchmark Definition**

The benchmark is defined by a JSON object with the following properties:

* `Name`: The name of the benchmark, which is "concat string vs array push".
* `Description`: An empty description, which means there's no additional context provided for this benchmark.
* `Script Preparation Code`:
```javascript
var arr = [];
var mxname = 'mxname';
```
This code sets up two variables: an empty array (`arr`) and a string variable (`mxname`) with the value `'mxname'`.

**Html Preparation Code**

There's no HTML preparation code, which means that this benchmark doesn't involve any rendering or DOM manipulation.

**Individual Test Cases**

The benchmark consists of two test cases:

1. **concat string**: The benchmark definition is `"'test string' + ' ' + mxname;"`. This creates a new string by concatenating three values:
	* `'test string'` (a fixed string)
	* A space character (`' '`))
	* The value of the `mxname` variable (which is set to `'mxname'`)
2. **array push**: The benchmark definition is `arr.push(mxname);`. This adds the value of the `mxname` variable to the end of an empty array (`arr`).

**Options Compared**

The two test cases compare the performance of string concatenation versus adding elements to an array.

**Pros and Cons:**

* **String Concatenation**:
	+ Pros:
		- Simple and efficient
		- Can be faster for small strings or when working with primitive types (e.g., numbers, booleans)
	+ Cons:
		- Can lead to string memory allocation and garbage collection overhead
		- May not be suitable for large strings or complex concatenations
* **Array Push**:
	+ Pros:
		- Efficient for appending elements to an existing array
		- Allows for more control over the data structure (e.g., inserting, removing elements)
	+ Cons:
		- Can lead to slower performance due to array resizing and reallocation overhead
		- May require additional memory allocation

**Library**

There's no explicit library mentioned in the benchmark definition. However, JavaScript engines typically use internal libraries for string manipulation, array operations, and garbage collection.

**Special JS Feature or Syntax**

There are no special features or syntax used in this benchmark. The code follows standard JavaScript conventions.

**Other Considerations**

* **Browser and Platform**: The benchmark runs on a specific Firefox 118 version on Ubuntu Linux (Desktop platform).
* **Test Case Execution Frequency**: Both test cases are executed at different frequencies, which could affect the results (e.g., `concat string` is executed more frequently).

**Alternatives**

If you're interested in exploring alternative JavaScript benchmarks or testing frameworks, some options include:

* Node.js benchmarking tools like `node-benchmark`
* Browser-specific performance testing frameworks like Chrome DevTools' Performance Tab
* General-purpose benchmarking libraries like Benchmark.js

Keep in mind that each tool has its own strengths and weaknesses, and the choice of which one to use depends on your specific needs and goals.

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:109.0) Gecko/20100101 Firefox/118.0

Browser/OS: Firefox 118 on Ubuntu

View result in a separate tab

Test name	Executions per second
concat string	1126659328.0 Ops/sec
array push	25360742.0 Ops/sec

Related benchmarks:

concat string vs array push (version: 0)

Comparing performance of: concat string vs array push

Created: 8 years ago by: Guest

Jump to the latest result

concat string

array push

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 25 days ago):