Benchmark: string concatenation vs. string template 2

Script Preparation code:

$colors = []
for (var i = 0; i <= 255; ++i) {
  $colors[i] = [i,i,i,i]
}

Tests:

string concatenation
for (var i = 500; i--;) { var c = $colors[i%256] console.log("rgba(" + c[0] + "," + c[1] + "," + c[2] + "," + c[3] + ")") }
string template
for (var i = 500; i--;) { var c = $colors[i%256] console.log(`rgba(${c[0]},${c[1]},${c[2]},${c[3]})`) }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
string concatenation
string template

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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I'll break down the provided benchmark and explain what's being tested, compared, and their pros and cons.

**Benchmark Overview**

The test compares two approaches for string concatenation: traditional string concatenation (using the "+" operator) and template literals (introduced in ECMAScript 2015).

**Script Preparation Code**

The script preparation code generates an array of colors, where each color is represented as an array with four elements. This is done to create a large dataset that can be used for benchmarking.

```javascript
$colors = []
for (var i = 0; i <= 255; ++i) {
  $colors[i] = [i,i,i,i]
}
```

**Test Cases**

There are two test cases:

1. **String Concatenation**
```javascript
for (var i = 500; i--;) {
  var c = $colors[i%256]
  console.log("rgba(" + c[0] + "," + c[1] + "," + c[2] + "," + c[3] + ")")
}
```

This test case uses traditional string concatenation by using the "+" operator to concatenate strings.

2. **String Template**
```javascript
for (var i = 500; i--;) {
  var c = $colors[i%256]
  console.log(`rgba(${c[0]},${c[1]},${c[2]},${c[3]})`)
}
```

This test case uses template literals, which were introduced in ECMAScript 2015. Template literals allow you to embed expressions inside string literals using backticks (`).

**Pros and Cons**

* **Traditional String Concatenation**
	+ Pros: widely supported across older browsers, easy to understand.
	+ Cons: slow due to the creation of intermediate strings.
* **Template Literals**
	+ Pros: faster performance, more expressive syntax, support for interpolated expressions.
	+ Cons: requires newer browsers or transpilation for older browsers.

**Library and Special JS Features**

This benchmark uses a custom `String Template` library, but it's not explicitly mentioned in the JSON. However, template literals are a built-in feature of modern JavaScript engines, starting from ECMAScript 2015.

**Other Considerations**

* The benchmark measures performance (Executions Per Second) on a specific browser and platform.
* The use of `$colors` as an array suggests that this is a generated dataset to create multiple iterations of the same color, ensuring consistent results for each test case.
* The benchmark skips preambles, which are typically initialization code not relevant to the performance test.

**Alternative Approaches**

If you're looking for alternative approaches or alternatives to template literals, consider:

1. **String Splicing**: Another traditional string concatenation method using `splice()`.
2. **`innerHTML` and `textContent`**: Using these properties to concatenate strings within an HTML context.
3. **Regular expressions**: Using regex patterns to generate string representations.

However, keep in mind that performance differences between these approaches are often negligible unless you're dealing with very large datasets or extremely sensitive optimization scenarios.

Related benchmarks:

string concatenation vs. string template 2 (version: 0)

Comparing performance of: string concatenation vs string template

Created: 4 years ago by: Guest

Jump to the latest result

string concatenation

string template

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):