Benchmark: push vs spread v3

Tests:

push
let r = ['asdfsadfsf', 'asdfsdf', 'asdfsadfsadfsf', 'asdfsdafsdf', 'asdfasfasdfasdfsdf'] r.push('ad')
spread
let r = ['asdfsadfsf', 'asdfsdf', 'asdfsadfsadfsf', 'asdfsdafsdf', 'asdfasfasdfasdfsdf'] r = [...r, 'ad']

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
push
spread

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 26 days ago):

LLMs can make mistakes. Check important info.

I'd be happy to help you understand the provided benchmark.

**Benchmark Overview**

The benchmark compares the performance of two approaches: using `push()` and using the spread operator (`...`) with array literals, in JavaScript version 3.

**Options Compared**

There are two main options being compared:

1. **`push()`**: This method adds a new element to the end of an array and returns the new length of the array.
2. **Spread Operator (`...`)**: This operator creates a new array by spreading elements from an existing array or values.

**Pros and Cons**

* **`push()`**:
	+ Pros: Can be more efficient in terms of memory allocation, as it modifies the original array in place.
	+ Cons: Can be slower due to the overhead of modifying the array's internal state.
* **Spread Operator (`...`)**:
	+ Pros: Creates a new array without modifying the original, which can be faster and more predictable for performance-critical code.
	+ Cons: Requires creating a new array object, which can lead to increased memory allocation.

**Library Used**

In this benchmark, no specific library is used. The JavaScript engine itself handles the execution of the test cases.

**Special JS Feature or Syntax**

There are no special JavaScript features or syntaxes being tested in this benchmark.

**Other Considerations**

The benchmark uses a simple array creation and modification pattern to simulate real-world usage scenarios.

**Alternative Approaches**

Some alternative approaches that might be worth considering include:

1. **Using `unshift()`**: This method adds an element to the beginning of an array, which can be slower than `push()`.
2. **Using a data structure other than arrays**: Depending on the specific use case, using a different data structure, such as a linked list or a stack, might provide better performance.
3. **Parallelizing the tests**: Running multiple threads or processes concurrently to test both options simultaneously.

Keep in mind that this benchmark is focused specifically on comparing the performance of `push()` and the spread operator (`...`) with array literals, so these alternative approaches may not be relevant to this particular use case.

Latest run results:

Run details: (Test run date: 2 years ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/96.0.4664.55 Safari/537.36

Browser/OS: Chrome 96 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
push	42240172.0 Ops/sec
spread	24266760.0 Ops/sec

Related benchmarks:

push vs spread v3 (version: 0)

Comparing performance of: push vs spread

Created: 2 years ago by: Guest

Jump to the latest result

push

spread

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated 26 days ago):