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BNGFUODPBNGPIODS
(version: 0)
Comparing performance of:
findIndex vs find
Created:
3 years ago
by:
Guest
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Script Preparation code:
var arr = []; let i = 0; while (i <= 1E5) arr[i] = {a: i++}
Tests:
findIndex
const findIndex = arr.findIndex(obj => obj?.a === 1E5)
find
const find = arr.find(obj => obj?.a === 100000)
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
findIndex
find
Fastest:
N/A
Slowest:
N/A
Latest run results:
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
I'll break down the explanation into sections to make it easier to understand. **Benchmark Definition JSON** The provided JSON represents a JavaScript microbenchmark, which is a small piece of code designed to measure the performance of a specific aspect of JavaScript. The benchmark definition includes: * `Name`: A unique identifier for the benchmark. * `Description`: An optional description of the benchmark, but in this case, it's null. * `Script Preparation Code`: A snippet of code that is executed before running the benchmark. In this case, it creates an array `arr` and populates it with objects containing a property `a`. The array grows up to 1E5 elements. * `Html Preparation Code`: An optional section for preparing HTML content, but in this case, it's null. **Options Compared** The benchmark tests two different options: 1. **`findIndex`**: This function uses the `findIndex()` method of an array, which returns the index of the first element that satisfies a provided condition. 2. **`find`**: This function uses the `find()` method of an array, which returns the first element that satisfies a provided condition. **Pros and Cons** Here are some pros and cons for each option: * `findIndex`: + Pros: More efficient than `find`, as it only needs to iterate over one element. + Cons: May be slower if the array is very large, since it needs to find the exact index of the first matching element. * `find`: + Pros: Easier to understand and use, especially for developers familiar with array methods. + Cons: Needs to iterate over all elements in the array, making it less efficient than `findIndex`. **Library Used** There is no library explicitly mentioned in the benchmark definition or individual test cases. However, the `arr` object created in the `Script Preparation Code` is likely using a built-in JavaScript feature, as it's not a standard library function. **Special JS Feature or Syntax** The benchmark uses the following special features: * **Arrow functions**: The `findIndex()` and `find()` methods use arrow functions to define the callback functions. This syntax was introduced in ECMAScript 2015 (ES6) and has since become widely supported. * **Optional chaining (`?.`)**: The arrow functions also use optional chaining, which allows accessing properties or calling methods on an object without explicitly checking for null or undefined values. **Other Alternatives** For similar use cases, other JavaScript libraries or frameworks might provide optimized implementations of `findIndex()` and `find()`. However, in this case, the built-in JavaScript methods are used, making it easy to port the benchmark to different environments. If you want to explore alternative implementations, some examples include: * Lodash: A popular utility library that provides an implementation of `findIndex()` and `find()`. * Ramda: A functional programming library that offers a `Find` function similar to JavaScript's `find()`. * Array.prototype.findIndex() and Array.prototype.find(): Some browsers or Node.js versions might not support these methods, making it necessary to use alternative implementations.
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