Benchmark: string concatenation vs template

Script Preparation code:

var val = 1234;

Tests:

concat
'hello ' + 'hi ' + val;
template
`hello hi ${val}`

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
concat
template

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 2 months ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/145.0.0.0 Safari/537.36 Edg/145.0.0.0

Browser/OS: Chrome 145 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
concat	204658560.0 Ops/sec
template	186707136.0 Ops/sec

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

LLMs can make mistakes. Check important info.

I'd be happy to explain what's being tested in this benchmark and the pros and cons of each approach.

**What is being tested:**

The provided JSON represents a JavaScript microbenchmark that compares two approaches for string concatenation:

1. **Concatenation using the `+` operator**: In this approach, strings are concatenated together using the `+` operator.
2. **Template literals**: The "template" benchmark uses template literals, which are introduced in ECMAScript 2015 (ES6). Template literals provide a more readable and efficient way to concatenate strings.

**Options compared:**

The benchmark is comparing two approaches:

* Concatenation using the `+` operator (`concat`)
* Template literals (`template`)

**Pros and cons of each approach:**

1. **Concatenation using the `+` operator**:
	* Pros:
		+ Widely supported across browsers and platforms.
		+ Simple to understand and implement.
	* Cons:
		+ Can lead to performance issues due to the creation of temporary strings.
		+ May not be as readable or maintainable as other approaches.
2. **Template literals**:
	* Pros:
		+ More readable and maintainable than concatenation using `+`.
		+ Provides better performance compared to concatenating individual strings together.
		+ Supports more features, such as expressions and interpolation.
	* Cons:
		+ May not be supported in older browsers or platforms (e.g., Internet Explorer).
		+ Requires ECMAScript 2015 (ES6) or later support.

**Library used:**

There is no library explicitly mentioned in the provided JSON. However, if we look at the "Benchmark Definition" section, we can see that the `val` variable is assigned a value using the `var` keyword. This suggests that the benchmark may be testing the behavior of JavaScript variables and expressions.

**Special JS feature or syntax:**

The benchmark uses template literals, which are a special feature introduced in ECMAScript 2015 (ES6). Template literals provide a more readable and efficient way to concatenate strings, and they support features like expression interpolation (`${expression}`) and method calls (`obj.method()`).

**Alternative approaches:**

Other approaches for string concatenation include:

* **String.join()**: A method that joins multiple strings together using a specified separator.
* **Array.prototype.concat()**: A method that concatenates arrays together, which can be used to concatenate strings.
* **Using a library or framework**: Some libraries and frameworks provide optimized string concatenation methods or utilities.

Overall, the benchmark is designed to compare the performance of two approaches for string concatenation: concatenating using the `+` operator and using template literals. The results provide insight into which approach is faster and more efficient in modern JavaScript environments.

Related benchmarks:

string concatenation vs template (version: 0)

Comparing performance of: concat vs template

Created: 4 years ago by: Guest

Jump to the latest result

concat

template

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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