Benchmark: Spread operator vs push on array and complex objects

Tests:

spread operator on objects
var params = [ { text: "AppsGlobalFilters_SearchSortingOptions_BestMatch", key: "Best Match" }, { text: "AppsGlobalFilters_SearchSortingOptions_Popularity", key: "Popularity" } ]; var other = [ { text: "AppsGlobalFilters_SearchSortingOptions_Rating", key: "Rating" }, { text: "AppsGlobalFilters_SearchSortingOptions_LastUpdated", key: "RecentlyUpdated" }, ...params, ];
Push objects
var params = [ { text: "AppsGlobalFilters_SearchSortingOptions_BestMatch", key: "Best Match" }, { text: "AppsGlobalFilters_SearchSortingOptions_Popularity", key: "Popularity" } ]; var other = [ { text: "AppsGlobalFilters_SearchSortingOptions_Rating", key: "Rating" }, { text: "AppsGlobalFilters_SearchSortingOptions_LastUpdated", key: "RecentlyUpdated" } ].push(...params);

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Test case name	Result
spread operator on objects
Push objects

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Slowest: N/A

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Autogenerated LLM Summary (model llama3.2:3b, generated one year ago):

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**Benchmark Overview**

MeasureThat.net is a website that allows users to create and run JavaScript microbenchmarks. The provided benchmark compares the performance of two approaches: using the spread operator (`...`) and the traditional `concat()` method, as well as the use of the push method on arrays.

**Test Cases**

There are two test cases:

1. **"spread operator on objects"**: This test case creates an array `params` with some predefined objects and then uses the spread operator to create a new array `other`. The objective is to measure the performance of using the spread operator.
2. **"Push objects"**: This test case also creates an array `params` with some predefined objects, but this time it uses the push method (`...`) to add elements to the `other` array.

**What's being tested?**

In both cases, we're testing how fast two different methods can create a new array by adding existing elements. The spread operator and the push method are used in slightly different ways:

* **Spread operator**: In this case, the spread operator is used as an array spread syntax (`...`), which creates a new array with all elements from `params`.
* **Push method**: In this case, the push method is used to add elements to the existing array `other`.

**Options compared**

Two approaches are being compared:

1. **Spread operator**: Creates a new array by spreading all elements from `params` into a new array.
2. **Push method**: Adds one or more elements to an existing array.

**Pros and Cons of each approach:**

* **Spread operator**:
	+ Pros:
		- More concise and readable code
		- Can be faster for large arrays, as it avoids the overhead of creating a new array object
	+ Cons:
		- May be slower for small arrays or arrays with few elements
		- Requires JavaScript engine to support this syntax (ES6+)
* **Push method**:
	+ Pros:
		- Suitable for older browsers that don't support spread operator
		- More control over when and how elements are added to the array
	+ Cons:
		- Can be slower than using an array spread syntax, especially for large arrays

**Library usage**

In both test cases, a library or a utility function is not explicitly mentioned. However, it's likely that JavaScript engines (like V8) implement these optimizations and performance differences.

**Special JS feature**

No special JavaScript features are used in this benchmark. The focus is on comparing two different approaches to creating new arrays.

**Alternative approaches**

Other methods could be explored to create new arrays:

1. **Array.from()**: This method creates a new array from an existing array or other iterable.
2. **concat()**: A built-in method that concatenates two or more arrays into a single array.
3. **slice() and push**: Another way to create a new array by using `slice()` to get a subset of the original array and then pushing elements onto it.

However, these alternatives might not be as concise or efficient as the spread operator for large arrays.

Overall, this benchmark aims to measure the performance difference between two approaches: using the spread operator (`...`) and the push method on arrays. The results can help developers optimize their code for better performance in JavaScript applications.

Related benchmarks:

Spread operator vs push on array and complex objects (version: 0)

Compare the new ES6 spread operator with the traditional concat() method and push

Comparing performance of: spread operator on objects vs Push objects

Created: 3 years ago by: Guest

Jump to the latest result

spread operator on objects

Push objects

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):