Benchmark: Testing array methods

Tests:

Array.from
const myval = '333333333' Array.from(myval)
Array.prototype.split
const myval = '333333333' var other = myval.split('')
spread operator
const myval = '333333333' var other = [ ...myval ]

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Suite status: <idle, ready to run>

Previous results

Test case name	Result
Array.from
Array.prototype.split
spread operator

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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Let's dive into the world of JavaScript microbenchmarks on MeasureThat.net.

**What is tested?**

The provided benchmark tests three different ways to convert a string into an array in JavaScript:

1. `Array.from()`: This method creates a new array from an iterable or an array-like object.
2. `Array.prototype.split('')`: This method splits a string into an array of substrings, where the separator is an empty string. This will effectively convert the string to an array of characters.
3. The spread operator (`var other = [ ...myval ]`): This syntax creates a new array by spreading the contents of the `myval` string into an array.

**Options compared**

The three methods are being tested for their performance, with the test running multiple executions per second (ExecutionsPerSecond) on various browsers and devices. The comparison aims to identify which method is the fastest and most efficient.

**Pros and Cons of each approach:**

1. `Array.from()`:
	* Pros: Modern JavaScript standard, widely supported, and concise.
	* Cons: May have a higher overhead due to its standardization, potentially slower than non-standard methods for older browsers or specific use cases.
2. `Array.prototype.split('')`:
	* Pros: Widely supported, simple syntax, and can be faster than `Array.from()` for certain use cases (e.g., when working with strings of a fixed length).
	* Cons: May not be as modern or efficient as other methods, potentially slower in newer browsers.
3. Spread operator (`var other = [ ...myval ]`):
	* Pros: New syntax introduced in ECMAScript 2015, fast and efficient, and widely supported.
	* Cons: Not as widely adopted as `Array.from()` or `split('')`, may not be compatible with older browsers.

**Library usage**

None of the test cases use any external libraries. The methods being tested are part of the standard JavaScript syntax.

**Special JS features or syntax**

The spread operator (`[ ...myval ]`) is a relatively recent addition to JavaScript (introduced in ECMAScript 2015). It allows spreading the elements of an array or object into another array, which can be used as an array literal.

**Alternative approaches**

Other methods for converting strings to arrays include:

* `String.prototype.split('')`: This method splits a string into an array of substrings using a separator. While similar to the spread operator, it's not exactly equivalent.
* `String.prototype.forEach()`: This method executes a function on each element in an array-like object (such as a string) without returning anything. While not directly converting the string to an array, it can be used in conjunction with other methods to achieve this goal.

Keep in mind that these alternative approaches may have different performance characteristics and are not necessarily equivalent to the spread operator or `Array.from()`.

Related benchmarks:

Testing array methods (version: 0)

Comparing performance of: Array.from vs Array.prototype.split vs spread operator

Created: 6 years ago by: Guest

Jump to the latest result

Array.from

Array.prototype.split

spread operator

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):