Benchmark: array.join(',') vs `${array}`

Script Preparation code:

var arr = ['1','2','3','4','5','6','7','8']

Tests:

array.join()
arr.join(',')
`${array}`
`${arr}`

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
array.join()
`${array}`

Fastest: N/A

Slowest: N/A

Latest run results:

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

User agent: Mozilla/5.0 (X11; Linux x86_64; rv:137.0) Gecko/20100101 Firefox/137.0

Browser/OS: Firefox 137 on Linux

View result in a separate tab

Test name	Executions per second
array.join()	4082943.0 Ops/sec
`${array}`	1919339.2 Ops/sec

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

LLMs can make mistakes. Check important info.

Let's break down the benchmark and explain what's being tested.

**Overview**

The benchmark compares two approaches for concatenating an array of strings into a single string: using the `join()` method and using template literals (the `${array}` syntax).

**What are we testing?**

We're testing which approach is faster, both in terms of raw execution time and in terms of the number of executions per second.

**Options being compared**

There are two options:

1. **`arr.join(',')`**: This uses the `join()` method to concatenate an array of strings into a single string.
2. **`${array}`**: This uses template literals to concatenate an array of strings into a single string.

**Pros and Cons:**

* **`arr.join(',')`**:
	+ Pros:
		- Widely supported in most browsers
		- Can be used with arrays of any type, not just strings
	+ Cons:
		- Less readable than template literals
		- May have performance issues if the array is very large
* **`${array}`**:
	+ Pros:
		- More readable and concise than `join()`
		- Can be used with arrays of any type, not just strings
	+ Cons:
		- Not supported in older browsers (pre-ES5)
		- May have performance issues if the array is very large

**Special JS feature/syntax:**

The template literals (`${array}`) are a special JavaScript syntax introduced in ECMAScript 2015 (ES6). They allow you to embed expressions inside string literals, which can be useful for concatenating strings with dynamic values.

**Library usage:**

None of the benchmark cases use any external libraries.

**Other alternatives:**

If `join()` or template literals are not suitable for your use case, other alternatives might include:

* Using the `+` operator to concatenate strings (e.g., `"1"+"2"`), although this is generally less readable and more error-prone.
* Using a library like Lodash's `joinBy()` function.

Overall, the benchmark is testing which approach to string concatenation is faster and more efficient in modern JavaScript environments.

Related benchmarks:

array.join(',') vs `${array}` (version: 0)

array.join(',') vs `${array}`

Comparing performance of: array.join() vs `${array}`

Created: 3 years ago by: Guest

Jump to the latest result

array.join()

`${array}`

Suite status: <idle, ready to run>

Fastest: N/A

Slowest: N/A

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