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difference2
(version: 0)
Comparing performance of:
diff vs b
Created:
6 years ago
by:
Guest
Jump to the latest result
HTML Preparation code:
<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>
Script Preparation code:
var a = _.range(0, 1000).map(i => ({a: {id: i}})) var b = [...a] b[500] = ({a: {id: 500}})
Tests:
diff
console.log(_.difference(a, b))
b
console.log(_.difference(a, b))
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
diff
b
Fastest:
N/A
Slowest:
N/A
Latest run results:
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's dive into the world of MeasureThat.net and explore what's being tested in this specific benchmark. **Benchmark Overview** The benchmark is designed to compare the performance of two approaches: using `_.difference(a, b)` directly and accessing an element in the resulting array (`b[500]`). **Script Preparation Code** The script preparation code generates two arrays, `a` and `b`, where: * `a` contains 1000 objects with a nested `id` property. * `b` is a copy of `a`, but with some modifications to trigger differences. The goal is to create a scenario where the benchmark can measure the performance of accessing an element in the resulting array (`b[500]`) versus using the `_.difference(a, b)` function. **Html Preparation Code** The HTML preparation code includes a link to the Lodash library (version 4.17.5), which provides the `_.difference` function used in the benchmark. **Individual Test Cases** There are two test cases: 1. **diff**: This test case runs the `console.log(_.difference(a, b))` statement and measures the time it takes to execute. 2. **b**: This test case also runs the same statement (`console.log(_.difference(a, b))`) but with a different variable name, `b`, assigned to the result of `_.difference(a, b)`. **What's being tested** The benchmark is testing two things: 1. The performance of accessing an element in the resulting array (`b[500]`). 2. The performance of using the `_.difference(a, b)` function. **Options compared** The benchmark is comparing two options: 1. **Direct access**: Accessing an element in the resulting array (`b[500]`). 2. **Using _.difference**: Using the `_.difference(a, b)` function to compute the difference between `a` and `b`. **Pros and Cons of each approach** * **Direct access (b[500])**: + Pros: May be faster for small arrays or specific use cases where direct access is needed. + Cons: Can lead to slower performance for larger arrays or when iterating over the entire array. * **Using _.difference**: + Pros: Provides a more efficient and safer way to compute differences between arrays, reducing the risk of off-by-one errors. + Cons: May be slower than direct access for very small arrays or specific use cases where iteration is necessary. **Library** The `_.difference` function is part of the Lodash library, which provides a set of utility functions for functional programming and data manipulation. **Special JS feature/syntax** There are no special JavaScript features or syntax used in this benchmark. The code is straightforward and focuses on demonstrating the performance comparison between two approaches. **Other alternatives** If you're interested in exploring alternative approaches to comparing arrays, here are a few options: * Using `Array.prototype.forEach` or `for...of` loops to iterate over the array. * Using `Array.prototype.every` or `Array.prototype.some` methods to find matching elements. * Using `Array.prototype.reduce` or `reduceRight` to compute aggregate values. Keep in mind that these alternatives may have different performance characteristics and use cases, so it's essential to test and evaluate them for your specific requirements.
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