Benchmark: key generation from number array - join vs toString vs loop

Script Preparation code:

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

Tests:

join
arr.join('')
toString
arr.toString()
number
let sum = 0; for (let i = 0; i < arr.length; i++) { sum += arr[i]; sum *= 10; }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
join
toString
number

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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**Overview**

MeasureThat.net is a website that allows users to create and run JavaScript microbenchmarks to compare the performance of different approaches. The provided benchmark measures the time taken to generate keys from a number array using three different methods: `join()`, `toString()`, and a custom loop.

**Test Cases**

There are three test cases:

1. **`join()`**: This method joins all elements in the array into a single string without any separator.
2. **`toString()`**: This method converts each element in the array to its string representation using the `toString()` method.
3. **`number`**: This is a custom loop that sums up all elements in the array and then multiplies the result by 10.

**Comparison**

The benchmark compares the performance of these three approaches on different browsers (Firefox 87) and devices (Desktop).

**Options Compared**

* `join()` vs `toString()`: These two methods are compared to see which one is faster for generating keys from a number array.
* Custom loop (`number`) vs `join()` vs `toString()`: This custom loop approach is compared with the two above-mentioned string-based approaches.

**Pros and Cons of Each Approach**

1. **`join()`**: Pros:
	* Simple to implement
	* Fast, as it doesn't involve any explicit looping or string conversion
Cons:
	* May not be suitable for large arrays, as it creates a single string that can be memory-intensive
2. **`toString()`**: Pros:
	* Fast and efficient, as it converts each element to its string representation without creating an intermediate string
Cons:
	* May involve unnecessary string copying or allocation, which can slow down performance
3. **Custom Loop (`number`)**: Pros:
	* Allows for fine-grained control over the summation process
Cons:
	* Involves explicit looping and arithmetic operations, which can be slower than the other two approaches

**Library Used**

None explicitly mentioned in the benchmark definition.

**Special JS Features or Syntax**

There are no special JavaScript features or syntax used in this benchmark. The test cases only use standard JavaScript methods like `join()`, `toString()`, and basic loop constructs.

**Other Alternatives**

Other alternatives for generating keys from a number array might include:

* Using a library like Lodash, which provides an optimized version of the `flatten` method
* Implementing a custom hash function using JavaScript's built-in `Math.random()` function or other entropy sources
* Using WebAssembly (WASM) or other low-level languages for performance-critical code

Related benchmarks:

key generation from number array - join vs toString vs loop (version: 0)

test

Comparing performance of: join vs toString vs number

Created: 5 years ago by: Guest

Jump to the latest result

join

toString

number

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):