Benchmark: Element addition comparison (short)

Script Preparation code:

var params = [ "hello", true, 7 ]

Tests:

Spread
var other = [ ...params, 'new' ]
Push
params.push('new');
Bracket
params[ params.length ] = 'new';

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Spread
Push
Bracket

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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Let's dive into the world of JavaScript microbenchmarks!

**What is being tested?**

The benchmark measures the performance of three different approaches to add an element to an array:

1. **Spread Operator (`...`)**: This operator creates a new array by spreading the elements of the original array.
2. **Push Method**: This method adds one or more elements to the end of the array.
3. **Brackets (Index Access)`: This approach uses direct indexing to add an element to the end of the array.

**Options being compared**

* `Spread Operator`
* `Push Method`
* `Brackets (Index Access)`

**Pros and Cons of each approach:**

1. **Spread Operator (`...`)**:
	* Pros:
		+ Creates a new array, which can be beneficial for performance in some cases.
		+ Allows for flexible and readable code.
	* Cons:
		+ Can be slower than other approaches due to the overhead of creating a new array.
2. **Push Method**:
	* Pros:
		+ Faster than spread operator due to fewer allocations.
		+ Simple and concise syntax.
	* Cons:
		+ May modify the original array, which can lead to unexpected behavior if not used carefully.
3. **Brackets (Index Access)**:
	* Pros:
		+ Fastest approach among the three, as it only accesses an existing array element.
		+ Suitable for large arrays or performance-critical code.
	* Cons:
		+ May be less readable due to the use of indexing.

**Library usage**

None of the test cases explicitly uses any external libraries. However, some libraries might provide optimized implementations of these methods, which could affect the benchmark results.

**Special JavaScript features or syntax**

The test case uses a simple and straightforward JavaScript syntax, without any advanced features like async/await, Promises, or modern ES6+ syntax. If more complex scenarios were tested, other considerations would come into play, such as:

* Handling errors and exceptions
* Supporting multiple data types in the array
* Optimizations for specific use cases (e.g., performance-critical loops)

**Other alternatives**

For array manipulation, JavaScript provides other methods beyond the three approaches being compared:

* `concat()`: Concatenates arrays instead of spreading or pushing elements.
* `unshift()`: Adds one or more elements to the beginning of the array.
* `splice()`: Modifies an existing array by removing or replacing elements.

These alternatives might be worth exploring in specific use cases, depending on performance requirements and code readability.

Related benchmarks:

Element addition comparison (short) (version: 0)

Spread vs. push vs. bracket

Comparing performance of: Spread vs Push vs Bracket

Created: 3 years ago by: Guest

Jump to the latest result

Spread

Push

Bracket

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):