Benchmark: SPlICE + UNSHIFT vs SORT (1000 items)

Script Preparation code:

var arr = [...Array(1000)].map((_,i) => i)

Tests:

SPLICE + UNSHIFT: array 1000 items; itemIndex - 1000
let newArr = [...arr] const item = 999 const itemIndex = newArr.findIndex((x) => x === item) console.log('SPLICE + UNSHIFT [0] before', newArr[0]) console.log('SPLICE + UNSHIFT length before', newArr.length) newArr.splice(itemIndex, 1) newArr.unshift(item) console.log('SPLICE + UNSHIFT [0] after', newArr[0]) console.log('SPLICE + UNSHIFT length after', newArr.length)
SORT: array 1000 items; itemIndex - 1000
let newArr = [...arr] const item = 999 const itemIndex = newArr.findIndex((x) => x === item) console.log('SORT [0] before', newArr[0]) console.log('SORT length before', newArr.length) newArr = newArr.sort((a, b) => { if (a === item) { return -1 } if (b === item) { return 1 } return 0 }) console.log('SORT [0] after', newArr[0]) console.log('SORT length after', newArr.length)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
SPLICE + UNSHIFT: array 1000 items; itemIndex - 1000
SORT: array 1000 items; itemIndex - 1000

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):

LLMs can make mistakes. Check important info.

Let's break down the provided benchmark and explain what is being tested.

**Benchmark Description**

The test compares two approaches for searching an array in JavaScript:

1. **SPLICE + UNSHIFT**: This approach uses the `splice()` method to remove an element at a specific index, and then shifts the remaining elements up to fill the gap.
2. **SORT**: This approach sorts the entire array using the `sort()` method, which has a linear search complexity.

**Options Compared**

The benchmark compares the performance of these two approaches:

* SPLICE + UNSHIFT
* SORT

**Pros and Cons of Each Approach**

1. **SPLICE + UNSHIFT**
	* Pros:
		+ More efficient than SORT for small arrays, as it avoids shifting the entire array.
		+ Can be faster for arrays with a single target element.
	* Cons:
		+ Requires two operations (splice and shift), which can be slower than SORT's single operation.
2. **SORT**
	* Pros:
		+ Fastest approach for large arrays, as it sorts the entire array once.
		+ Allows for more advanced search algorithms, such as binary search.
	* Cons:
		+ Slow for small arrays, due to the sorting overhead.
		+ Requires O(n log n) time complexity.

**Library and Special JS Features**

The benchmark uses the following library:

* None explicitly stated, but it's likely that the test is running in a modern JavaScript environment with built-in support for array methods like `sort()` and `splice()`.

No special JS features or syntax are used in this benchmark. The code adheres to standard JavaScript practices.

**Other Alternatives**

Some alternative approaches could be:

1. **Binary Search**: A more efficient approach than SORT, but still requires sorting the entire array. Binary search has a time complexity of O(log n), making it suitable for large arrays.
2. **Linear Search with Cache**: This approach stores the previously searched elements in an index, reducing the number of iterations required to find a specific element. However, this approach is more complex and may not be as efficient as SORT.

**Benchmark Result Interpretation**

The benchmark result shows the execution time per second for each browser on each platform. The results indicate that:

* SPLICE + UNSHIFT is faster than SORT for this specific test case (SPLICE + UNSHIFT: 74741.5859375 executions/second vs SORT: 38921.3828125 executions/second).
* However, the difference in performance may not be significant enough to justify using SPLICE + UNSHIFT over SORT for general array searching tasks.

Keep in mind that benchmark results can vary depending on the specific test case, hardware, and JavaScript environment used.

Related benchmarks:

SPlICE + UNSHIFT vs SORT (1000 items) (version: 0)

Comparing performance of: SPLICE + UNSHIFT: array 1000 items; itemIndex - 1000 vs SORT: array 1000 items; itemIndex - 1000

Created: 3 years ago by: Registered User

Jump to the latest result

SPLICE + UNSHIFT: array 1000 items; itemIndex - 1000

SORT: array 1000 items; itemIndex - 1000

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):