Benchmark: asdfasdf - MeasureThat.net

Script Preparation code:

var a = [1,1,1,1,23,,5,6,3,2132,,66,456,,546];
var s = []

Tests:

spread
s.push(...a);
p-push
Array.prototype.push.apply(s, a);
[] push
[].push.apply(s, a);
self push
s.push.apply(s, a);
for of
for (const item of a) { s.push(a); }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
spread
p-push
[] push
self push
for of

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 28 days ago):

LLMs can make mistakes. Check important info.

I'd be happy to help you understand the provided benchmark.

**Benchmark Overview**

The provided benchmark is designed to measure the performance of JavaScript arrays and their push method. The test cases compare different ways of pushing elements into an array, including using the spread operator (`...`), `Array.prototype.push.apply()`, creating a new empty array (`[]`) and pushing using it, and a for-of loop.

**Script Preparation Code**

The script preparation code defines an array `a` with a mix of numbers and special values, which will be used as input to the test cases. The script also creates an empty array `s`.

**Html Preparation Code**

There is no HTML preparation code provided, which means that this benchmark only runs in a JavaScript context.

**Test Cases**

The test cases are defined as JSON objects, each with two properties:

1. `Benchmark Definition`: This property contains the actual JavaScript code being tested.
2. `Test Name`: This property provides a human-readable name for the test case.

There are five test cases in total, each testing a different approach to pushing elements into an array:

1. **`spread`**: Tests using the spread operator (`...`) to push elements into the array.
2. **`p-push`**: Tests using `Array.prototype.push.apply()` to push elements into the array.
3. **`[] push`**: Tests creating a new empty array (`[]`) and pushing elements into it, which is then used to push elements into the original array `s`.
4. **`self push`**: Tests pushing elements directly onto the original array `s` using the `push()` method.
5. **`for of`**: Tests using a for-of loop to iterate over the elements of the input array `a` and push each element into the array `s`.

**Browser Results**

The benchmark results show the performance data collected from running the test cases on different browsers and devices, including:

1. Browser name and version
2. Device platform
3. Operating system
4. Number of executions per second (ExecutionsPerSecond)

**Libraries Used**

There is no library explicitly mentioned in the benchmark code, but it's worth noting that the `Array.prototype.push.apply()` method is a part of the JavaScript standard library.

**Special JavaScript Features/Syntax**

The spread operator (`...`) and the for-of loop are two features introduced in ECMAScript 2015 (ES6). The for-of loop allows iterating over arrays and other iterable objects using a more concise syntax. Both features have been widely adopted by modern JavaScript engines, including those used by Firefox.

**Other Alternatives**

If you were to implement this benchmark yourself, here are some alternatives to consider:

1. **Using `Array.prototype.forEach()`**: Instead of pushing elements directly onto the array, you could use `Array.prototype.forEach()` to iterate over the input array and push each element into the original array.
2. **Using a custom array implementation**: You could implement your own array data structure and compare its performance with the built-in `Array` type.
3. **Adding more test cases**: Consider adding more test cases to cover additional scenarios, such as pushing elements onto an empty array or using other array methods like `unshift()` or `splice()`.

Latest run results:

Run details: (Test run date: 2025 years ago)

User agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:58.0) Gecko/20100101 Firefox/58.0

Browser/OS: Firefox 58 on Ubuntu

View result in a separate tab

Test name	Executions per second
spread	809117.9 Ops/sec
p-push	1009944.6 Ops/sec
[] push	923399.7 Ops/sec
self push	224487.9 Ops/sec
for of	58712.3 Ops/sec

Related benchmarks:

asdfasdf (version: 0)

asdf

Comparing performance of: spread vs p-push vs [] push vs self push vs for of

Created: 6 years ago by: Guest

Jump to the latest result

spread

p-push

[] push

self push

for of

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 28 days ago):