Benchmark: spread vs push 001

Tests:

spread
const arr = [1, 2] const params = [ "hello", true]; arr.push(...params);
push
const arr = [1, 2] arr.push("hello"); arr.push(true);

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
spread
push

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 break down what is being tested in the provided JSON benchmark.

**Benchmark Definition**

The `Benchmark Definition` field defines the basic structure of the benchmark, including:

* The script preparation code (which is empty in this case)
* The HTML preparation code (also empty)
* A description and name for the benchmark

However, the most important part of the definition is the actual benchmark script, which is defined as a string.

In this case, there are two benchmark scripts:

1. `arr.push(...params);` - This line uses the spread operator (`...`) to add multiple elements to an array.
2. `arr.push("hello"); arr.push(true);` - This line adds two single elements to an array using the `push()` method.

**Options Compared**

The two benchmark scripts are being compared to measure their performance differences.

* The first script uses the spread operator (`...`) to add multiple elements to an array.
* The second script uses the `push()` method with multiple arguments (single string and boolean) to achieve the same result.

**Pros and Cons of Different Approaches**

1. **Spread Operator (`...`)**:
	* Pros:
		+ More concise and readable
		+ Can handle variable number of elements
	* Cons:
		+ May be slower due to the overhead of creating a new array
2. **Push Method with Multiple Arguments**:
	* Pros:
		+ Faster, since it only needs to call `push()` once
	* Cons:
		+ Less readable and more error-prone (especially for large numbers of elements)
3. Other considerations:

* In modern JavaScript engines, the spread operator is optimized to be just as efficient as the `push()` method with multiple arguments.
* However, in older browsers or environments, there might be performance differences.

**Library Used**

There is no library explicitly mentioned in this benchmark. The scripts use built-in JavaScript features like arrays and the spread operator (`...`).

**Special JS Feature or Syntax**

The spread operator (`...`) was introduced in ECMAScript 2015 (ES6) as part of a new feature called "rest parameters" or "spread syntax". It allows you to add multiple elements to an array by passing a variable number of arguments.

In the benchmark, the spread operator is used to pass multiple string and boolean values to the `push()` method. This is a common use case for the spread operator in modern JavaScript development.

**Alternatives**

If you wanted to rewrite this benchmark using different approaches, here are some alternatives:

1. Use a loop instead of the spread operator: `for (let i = 0; i < params.length; i++) { arr.push(params[i]); }`
2. Use an array constructor or spread operator with multiple arguments and then call `push()`: `[...params].forEach((item) => arr.push(item));`
3. Use a library like Lodash to handle the array operations: `_arr.push(...params);` (assuming Lodash is included in your project)

Keep in mind that these alternatives might not provide significant performance differences, and the benchmark may not be representative of real-world use cases.

Related benchmarks:

spread vs push 001 (version: 0)

Comparing performance of: spread vs push

Created: 2 years ago by: Guest

Jump to the latest result

spread

push

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):