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Some vs Find vs Find Index
(version: 0)
Comparing performance of:
Find vs Some vs Find Index
Created:
3 years ago
by:
Guest
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Script Preparation code:
var data = [] for (let i = 0; i < 5000; ++i) data.push({ username: 'toto' }) data.push({ username: 'titi' }) for (let i = 0; i < 2500; ++i) data.push({ username: 'toto' })
Tests:
Find
data.find(e => e.username === 'titi')
Some
data.some(e => e.username === 'titi')
Find Index
data.findIndex(e => e.username === 'titi')
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (3)
Previous results
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Test case name
Result
Find
Some
Find Index
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 JSON and explain what is being tested. **Benchmark Definition** The benchmark definition represents three different ways to search for an element in an array: 1. **Some**: `data.some(e => e.username === 'titi')` 2. **Find Index**: `data.findIndex(e => e.username === 'titi')` These two methods are used to check if at least one element in the array satisfies a certain condition. **Comparison** The comparison being tested is between the performance of these two methods: * **Some**: This method returns `true` as soon as it finds an element that matches the condition, and then stops iterating over the rest of the array. * **Find Index**: This method returns the index of the first element that matches the condition, or `-1` if no element is found. **Pros and Cons** * **Some**: + Pros: Can be faster for small arrays or when a quick check is sufficient. Returns `true` immediately, which can be beneficial in certain scenarios. + Cons: May not be suitable for large arrays, as it has to iterate over the entire array before returning. * **Find Index**: + Pros: Suitable for finding the index of an element, or checking if no element is found. Can be faster than `some` when iterating over a small subset of elements. + Cons: Returns an index value, which might require additional processing to extract the relevant information. **Library and Special JS Features** There are no libraries used in this benchmark, but it does utilize some special JavaScript features: * **Arrow functions**: Used in the `some` and `findIndex` methods for concise syntax. * **Template literals**: Used in the script preparation code to create a simple array of objects. **Other Alternatives** If you're looking for alternative ways to search for an element in an array, some options include: * Using `forEach` with a callback function: `data.forEach(e => { if (e.username === 'titi') { // do something } });` * Using `map` and then checking the resulting array: `data.map(e => e.username).includes('titi');` * Using `filter`: `data.filter(e => e.username === 'titi');` However, these alternatives may not be as efficient or concise as the original methods being tested in this benchmark.
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