Benchmark: array.join(",") vs array.ToString()

Script Preparation code:

var testArray = [1,2,3,4,5,6,7,8,9]

Tests:

Join
testArray.join(",")
toString()
testArray.toString()

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Join
toString()

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 break down the benchmark and its components.

**Benchmark Definition**

The benchmark is designed to measure the performance of two different approaches for creating a comma-delimited string from an array: `array.join(",")` and `array.toString()`. The goal is to determine which approach is faster.

**Options Compared**

Two options are being compared:

1. **`array.join(",")`**: This method uses the `join()` function, which concatenates all elements of the array and returns a new string with the specified separator.
2. **`array.toString()```**: This method converts the entire array to a string using the `toString()` function.

**Pros and Cons**

Here are some pros and cons for each approach:

* **`array.join(",")`**
	+ Pros:
		- More flexible, as it allows specifying a custom separator.
		- Can be used with arrays of different data types.
	+ Cons:
		- May be slower for very large arrays due to the overhead of concatenating strings.
* **`array.toString()```**
	+ Pros:
		- Faster for very large arrays, as it uses a single string conversion operation.
	+ Cons:
		- Less flexible, as it only works with arrays of strings.

**Library and Special JS Feature**

There is no specific library mentioned in the benchmark definition. However, note that `toString()` will attempt to convert each element of the array to a string, which may not work correctly for non-string elements (e.g., numbers, booleans).

**Test Case Explanation**

The test case consists of two individual tests:

* **"Join"`**: Tests the performance of `array.join(",")`.
* **"toString()"`: Tests the performance of `array.toString()`.

These tests are likely using a sample array (`testArray`) with a mix of integer values, which will be converted to strings and then joined or concatenated as specified.

**Other Alternatives**

Some alternative approaches for creating comma-delimited strings from arrays include:

* Using the `reduce()` function: `array.reduce((a, b) => a + "," + b, "")`
* Using a custom loop with string concatenation
* Using a library like Lodash's `join()` function

It's worth noting that in modern JavaScript, using `String.prototype.join()` is generally considered the most efficient and readable approach.

If you'd like to explore other alternatives or modify this benchmark, feel free to ask!

Latest run results:

Run details: (Test run date: 9 months ago)

User agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/121.0.0.0 Safari/537.36

Browser/OS: Chrome 121 on Windows

View result in a separate tab

Test name	Executions per second
Join	2422186.5 Ops/sec
toString()	2215600.0 Ops/sec

Related benchmarks:

array.join(",") vs array.ToString() (version: 0)

Tests the speed of creating a comma delim string

Comparing performance of: Join vs toString()

Created: one year ago by: Guest

Jump to the latest result

Join

toString()

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):