Benchmark: lodash xor alternatives Copy 2

HTML Preparation code:


<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>

Script Preparation code:

function dec2hex (dec) {
  return dec < 10
    ? '0' + String(dec)
    : dec.toString(16)
}

function generateId (len) {
  var arr = new Uint8Array((len || 40) / 2)
  window.crypto.getRandomValues(arr)
  return Array.from(arr, dec2hex).join('')
}

var a = []
var b = []
for( let i = 0; i < 1000; i++)
{
  a[i] = generateId(16)
  b[i] = generateId(16)
}

Tests:

current xor implementation
const res = _.xor(a,b)
alternative with Sets
function xor(...arrs) { const filterSet = (set, predicate) => { const newSet = new Set(set); for (const item of set) { if (!predicate(item)) { newSet.delete(item); } } return newSet; }; const xorValues = arrs .reduce((current, next) => { const newSet = new Set(); const nextSet = new Set(next); for (const item of filterSet(current, (value) => !nextSet.has(value))) { newSet.add(item); } for (const item of filterSet(nextSet, (value) => !current.has(value))) { newSet.add(item); } return newSet; }, new Set()); return Array.from(xorValues); } const res = xor(a,b)

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
current xor implementation
alternative with Sets

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 what's being tested on the provided JSON.

**Benchmark Definition**

The benchmark is comparing two approaches to implement the `_.xor` function from Lodash, which returns an array of elements that are present in either of the input arrays, but not in both.

**Options Compared**

Two options are compared:

1. **Current implementation**: This is the original Lodash implementation of `_xor`, which uses a custom binary xor (XOR) operation to find the differences between two sets.
2. **Alternative with Sets**: This approach uses JavaScript's built-in `Set` data structure to efficiently find the differences between two arrays.

**Pros and Cons**

**Current Implementation:**

Pros:

* Familiar implementation, potentially easier to understand and modify
* Might be optimized for specific use cases or browsers

Cons:

* Can be slower than using Set operations due to custom binary xor logic
* May not handle edge cases well (e.g., empty arrays)

**Alternative with Sets:**

Pros:

* Faster execution times due to efficient set operations
* More concise and readable code
* Handles edge cases well (e.g., empty arrays) by returning an empty array

Cons:

* Requires understanding of Set data structures and binary xor logic
* Might be less familiar implementation for some developers

**Library: Lodash**

Lodash is a popular JavaScript utility library that provides a wide range of functions for tasks like string manipulation, array manipulation, and more. The `_.xor` function is one of these utilities, providing a convenient way to find differences between two arrays.

**Special JS Feature or Syntax**

None mentioned in the provided benchmark definition. However, Set operations are a built-in JavaScript feature that can be used to achieve similar results without relying on external libraries like Lodash.

**Other Alternatives**

If you're interested in exploring other alternatives for implementing `_.xor`, some options might include:

* Using a custom array implementation with optimized binary xor logic
* Utilizing browser-specific APIs or extensions (e.g., WebAssembly) for improved performance
* Implementing the algorithm using recursive functions or memoization techniques

However, these alternatives might not be as efficient or concise as using Set operations, and would likely require significant investment in development time to achieve similar results.

Related benchmarks:

lodash xor alternatives Copy 2 (version: 0)

.

Comparing performance of: current xor implementation vs alternative with Sets

Created: 4 years ago by: Guest

Jump to the latest result

current xor implementation

alternative with Sets

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):