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Includes v Has
(version: 0)
Comparing performance of:
Includes vs Has
Created:
3 years ago
by:
Guest
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Script Preparation code:
var a = [] for (var i = 1; i <= 1000000; i++) { a.push(i); } var b = new Set(a)
Tests:
Includes
return a.includes(500000)
Has
return b.has(500000)
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
Includes
Has
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 break down the provided benchmark and explain what's being tested. **Benchmark Definition** The benchmark is defined by two test cases: 1. `Includes`: Tests whether the `includes()` method returns true for the value 500,000 in an array (`a`). 2. `Has`: Tests whether the `has()` method returns true for the value 500,000 in a Set (`b`). **Script Preparation Code** The script preparation code creates two variables: * `a`: An array of 1,000,000 integers, populated with values from 1 to 1,000,000. * `b`: A new Set created from the elements of `a`. **Html Preparation Code** There is no HTML preparation code provided. **Options Compared** The benchmark compares two approaches: 1. **Includes**: Uses the `includes()` method on an array (`a`). 2. **Has**: Uses the `has()` method on a Set (`b`). **Pros and Cons** * **Includes**: + Pros: Simple to implement, can be faster for small arrays. + Cons: May be slower for large arrays due to the need to search through the entire array. * **Has**: + Pros: Can be faster for large Sets due to the use of a hash table, allowing for O(1) lookups. + Cons: May require additional memory allocation, and may have overhead from creating the Set. **Library and Purpose** The `Set` object is a built-in JavaScript library that provides an efficient way to store unique values. It's designed to eliminate duplicates and provide fast lookup times using hash tables. **Special JS Feature or Syntax** There are no special JS features or syntax mentioned in this benchmark. **Other Alternatives** If you were to implement your own version of these benchmarks, you could also consider: * Using `Array.prototype.find()` instead of `includes()` * Using a custom implementation for the `Set` object * Using a different data structure, such as a Map or an Object Keep in mind that the performance differences between these approaches may be negligible for small arrays, but can become significant when dealing with large datasets. As a software engineer, understanding the trade-offs and implications of these choices is crucial for making informed decisions about your code's performance and scalability.
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array.includes vs set.has 2022
Includes v Has #2
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set vs array iteration 100k elements
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