Benchmark: spread operator vs push test2

Tests:

spread operator true
const test = [ { domain: undefined, iconName: "a", }, { domain: "b", iconName: "b", }, { domain: "c", iconName: "c", }, { domain: "d", iconName: "d", }, { domain: "e", iconName: "e", }, ...([{ domain: "f", iconName: "f", }]) ];
spread operator false
const test = [ { domain: undefined, iconName: "a", }, { domain: "b", iconName: "b", }, { domain: "c", iconName: "c", }, { domain: "d", iconName: "d", }, { domain: "e", iconName: "e", }, ...([]) ];
Push true
const abc = true; const test = [ { domain: undefined, iconName: "a", }, { domain: "b", iconName: "b", }, { domain: "c", iconName: "c", }, { domain: "d", iconName: "d", }, { domain: "e", iconName: "e", }, ]; if (abc) { test.push({ domain: "f", iconName: "f", }); }
push false
const abc = false; const test = [ { domain: undefined, iconName: "a", }, { domain: "b", iconName: "b", }, { domain: "c", iconName: "c", }, { domain: "d", iconName: "d", }, { domain: "e", iconName: "e", }, ]; if (abc) { test.push({ domain: "f", iconName: "f", }); }

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
spread operator true
spread operator false
Push true
push false

Fastest: N/A

Slowest: N/A

Latest run results:

No previous run results

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

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I'll dive into explaining the benchmark and its results.

**What is being tested?**

MeasureThat.net is comparing three different approaches for adding elements to an array in JavaScript:

1. **Spread Operator (`...`)**: This is a new ES6 feature that allows you to spread the properties of an object (or an array) into a new array.
2. **Concatenation using `push()`**: This involves creating a new array and then pushing each element from the original array into it.
3. **Conditional `push()` with a boolean variable**: This approach uses a conditional statement to decide whether to push an element onto the array based on the value of a boolean variable.

**Options being compared**

The three options are:

* `spread operator true`: Spreads all elements from the object and its nested arrays.
* `spread operator false`: Only spreads the top-level properties, ignoring any nested arrays.
* `push true` (and `push false`): Uses `push()` to add a single element to the array if the boolean variable is true or false, respectively.

**Pros and Cons of each approach**

1. **Spread Operator (`...`)**
	* Pros:
		+ More concise and readable code
		+ Can handle nested arrays and objects efficiently
	* Cons:
		+ May have performance issues with large datasets due to the overhead of creating a new array
2. **Concatenation using `push()`**
	* Pros:
		+ Simple and straightforward approach
		+ Works well for small to medium-sized datasets
	* Cons:
		+ Can be slower than spread operator for larger datasets
		+ May lead to stack overflow errors if the array is too large
3. **Conditional `push()` with a boolean variable**
	* Pros:
		+ Provides more control over when elements are added to the array
	* Cons:
		+ More verbose code compared to spread operator or push()
		+ May not be as efficient as other approaches for very large datasets

**Library and special JS features**

There is no specific library mentioned in the benchmark. However, it's worth noting that the `...` operator is a part of the ES6 specification and has been implemented in most modern browsers.

No special JS features are used in this benchmark.

**Other alternatives**

If you need to add elements to an array in JavaScript, there are other approaches you could consider:

* Using `Array.prototype.concat()` or `Array.prototype.splice()`
* Creating a new array using the `Array` constructor and then pushing elements onto it
* Using a library like Lodash (if you're looking for a more functional programming approach)

Keep in mind that the best approach will depend on your specific use case, dataset size, and performance requirements.

Related benchmarks:

spread operator vs push test2 (version: 0)

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

Comparing performance of: spread operator true vs spread operator false vs Push true vs push false

Created: 4 years ago by: Guest

Jump to the latest result

spread operator true

spread operator false

Push true

push false

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):