Benchmark: Push objects into array

Script Preparation code:

var arr = [{id: 1, url: '/grgreg/gt'},{id: 2, url: '/grgreg/ggtegtrtht'},{id: 3, url: '/grgreg/gtdf'}];
var result = [];

Tests:

push
for(var i = 0; i < 100; i++){ arr.forEach(item=>result.push(item)); }
spread
for(var i = 0; i < 100; i++) { result = [...arr]; }
concate
for(var i = 0; i < 100; i++) { result.concat(arr); }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
push
spread
concate

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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Let's dive into the world of JavaScript microbenchmarks.

**Benchmark Definition JSON Explanation**

The provided JSON defines two benchmarking scripts: a single script that prepares an array (`arr`) and two test cases:

1. `push`: Iterates over the `arr` array using `forEach` and pushes each item to a new result array.
2. `spread`: Creates a new copy of the `arr` array using the spread operator (`[...arr]`) and assigns it to the `result` variable.
3. `concate`: Concatenates the `arr` array with the `result` array using the `concat` method.

The script preparation code defines an array `arr` with three objects, each containing an `id` and a `url`. The `Html Preparation Code` field is empty in this case.

**Options Compared**

These test cases compare different ways to perform iterative operations on arrays:

1. **Push**: Using the `forEach` method and pushing each item into a new array.
2. **Spread**: Creating a new copy of the original array using the spread operator and assigning it to a new variable.
3. **Concate**: Concatenating the original array with a separate array.

**Pros and Cons**

1. **Push**: Pros:
	* Simple and straightforward implementation.
	* No need to create an intermediate copy of the original array.
Cons:
	* Can be slower due to the overhead of creating a new array and pushing elements into it.
2. **Spread**: Pros:
	* Creates a new, independent copy of the original array, which can improve performance in some cases.
Cons:
	* Requires modern JavaScript features (ECMAScript 2015+) for the spread operator.
3. **Concate**: Pros:
	* No need to create an intermediate copy of the original array.
Cons:
	* Concatenation creates a new, large array that may not be suitable for all use cases.

**Library and Special JS Features**

There are no libraries mentioned in the provided benchmark definition. However, the `forEach` method and spread operator (`[...arr]`) require modern JavaScript features (ECMAScript 2015+) for their implementation.

**Other Alternatives**

If you need to perform iterative operations on arrays, you might also consider other approaches:

1. **Loops**: Using traditional loops (e.g., `for`, `while`) instead of array methods like `forEach` or spread operator.
2. **Map**: Using the `map()` method, which creates a new array with the results of applying a given function to each element in the original array.
3. **Array.prototype.reduce()**: Using the `reduce()` method, which applies a given function to each element in the array and returns a single value.

Keep in mind that these alternatives may have different performance characteristics and are suited for specific use cases.

In summary, the provided benchmark definition tests three ways to perform iterative operations on arrays: push, spread, and concatenate. The choice of approach depends on the specific requirements and constraints of your project.

Related benchmarks:

Push objects into array (version: 0)

Comparing performance of: push vs spread vs concate

Created: 7 years ago by: Guest

Jump to the latest result

push

spread

concate

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):