Benchmark: Native JS: concatenate array of strings with + vs template literals vs String.concat vs array.join

Script Preparation code:

window.arr = ["id", ":1, ", "name", ": someItem"]

window.calcplus = (arr) => {
    return arr[0] + arr[1] + arr[2] + arr[3];
}

window.calcconcat = (arr) => {
    return "".concat(...arr);
}

window.calcliteral = (arr) => {
    return `${arr[0]}${arr[1]}${arr[2]}${arr[3]}`;
}

window.calcjoin = (arr) => {
    return arr.join("");
}

Tests:

using plus operator
const result = window.calcplus(window.arr);
using concat function
const result = window.calcconcat(window.arr);
using template literals
const result = window.calcliteral(window.arr);
using join function
const result = window.calcjoin(window.arr);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
using plus operator
using concat function
using template literals
using join function

Fastest: N/A

Slowest: N/A

Latest run results:

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

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**Benchmark Overview**

The provided benchmark is designed to measure the performance of different methods for concatenating strings in JavaScript: using the `+` operator, template literals, the `concat()` method, and the `join()` method.

**Options Compared**

The four options being compared are:

1. **Using the `+` operator**: This method involves manually concatenating the strings by adding them together.
2. **Template Literals**: Template literals are a syntax feature introduced in ECMAScript 2015 that allows for more readable and efficient string concatenation using backticks (`).
3. **The `concat()` method**: The `concat()` method is a built-in JavaScript function that concatenates one or more strings together.
4. **The `join()` method**: The `join()` method is another built-in JavaScript function that concatenates an array of strings into a single string.

**Pros and Cons**

1. **Using the `+` operator**:
	* Pros: Simple, widely supported, and well-understood syntax.
	* Cons: Can lead to performance issues if used in loops or with large arrays.
2. **Template Literals**:
	* Pros: More readable and efficient than using the `+` operator, especially for complex concatenations.
	* Cons: May not be supported by older JavaScript engines or browsers.
3. **The `concat()` method**:
	* Pros: Fast and efficient, as it uses native code under the hood.
	* Cons: Can lead to performance issues if used with large arrays or in loops.
4. **The `join()` method**:
	* Pros: Fast and efficient, especially for concatenating arrays of strings.
	* Cons: May not be supported by older JavaScript engines or browsers.

**Library Usage**

None of the individual test cases use any libraries beyond the built-in JavaScript functions (`concat()`, `join()`, and template literals).

**Special JS Feature or Syntax**

Template literals are a special syntax feature in JavaScript that allows for more readable and efficient string concatenation using backticks (`). This is used in one of the individual test cases.

**Benchmark Preparation Code**

The preparation code sets up four variables: `window.arr` (an array of strings), `window.calcplus`, `window.calcconcat`, `window.calcliteral`, and `window.calcjoin`. The latter three functions are defined to concatenate the strings in each case, respectively.

**Other Alternatives**

If you're looking for alternative methods for concatenating strings in JavaScript, some options include:

* Using a library like Lodash or Underscore.js
* Using a string interpolation method like jQuery's `.text()` function
* Using a custom implementation using `split()`, `join()`, and other string manipulation methods

Keep in mind that these alternatives may have different performance characteristics and trade-offs compared to the options being benchmarked.

Related benchmarks:

Native JS: concatenate array of strings with + vs template literals vs String.concat vs array.join (version: 0)

find best solution for concatenate 4 strings

Comparing performance of: using plus operator vs using concat function vs using template literals vs using join function

Created: 3 years ago by: Guest

Jump to the latest result

using plus operator

using concat function

using template literals

using join function

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):