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underscore pick vs object descturct
(version: 0)
Comparing performance of:
Lodash vs Object desctruct
Created:
3 years ago
by:
Guest
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HTML Preparation code:
<script src='https://cdnjs.cloudflare.com/ajax/libs/lodash.js/4.17.5/lodash.min.js'></script>
Tests:
Lodash
const obj = { a:1, b:1, c:1, d:1, e:1, f:1, g:1, h:1, i:1, } const n = _.pick(obj, ['a','d','i']);
Object desctruct
const obj = { a:1, b:1, c:1, d:1, e:1, f:1, g:1, h:1, i:1, } const {a, d, i} = obj; const n = {a, d, i};
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
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Test case name
Result
Lodash
Object desctruct
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 JavaScript microbenchmarks! **Benchmark Overview** The provided benchmark measures two approaches for selecting specific properties from an object in JavaScript: using the `_.pick()` function from Lodash (a popular utility library) and using destructuring assignment (`Object desctruct`). **Lodash (.pick()) Approach** * **Library:** Lodash is a utility library that provides a wide range of functions for tasks such as array manipulation, string manipulation, and more. * **Purpose:** The `_.pick()` function allows you to select specific properties from an object, returning a new object with only the desired properties. **Object Desctruct Approach** * **Description:** This approach uses destructuring assignment to extract specific properties from an object into separate variables. * **Pros:** + Can be more efficient since it avoids creating a new object and instead reuses the original object's memory. + Often considered more "JavaScript-like" since it leverages the language's built-in features. * **Cons:** + Requires explicit variable declarations for each property being extracted, which can lead to verbose code. + May not work as expected if the order of properties changes or if there are duplicate keys. **Other Considerations** * Both approaches assume that the object has multiple properties with unique names. If the object has duplicate keys or no keys, one approach may fail or produce unexpected results. * The `_.pick()` function returns a new object, while the Object Desctruct approach reuses the original object's memory. **Benchmark Test Cases** The provided test cases demonstrate both approaches: 1. "underscore pick vs object desctruct": This test case measures the performance difference between using Lodash's `_.pick()` function and destructuring assignment to select specific properties from an object. 2. The individual test cases (`"Lodash"` and `"Object desctruct"`): These test cases demonstrate each approach individually, with the benchmark measuring their relative performance. **Alternatives** Other approaches for selecting properties from an object in JavaScript include: * Using `Object.keys()` to get an array of property names, followed by using `forEach` or a loop to iterate over the array and assign values to new variables. * Using `for...in` loop to iterate over the object's properties and extract them manually. However, these alternatives are generally less efficient than the Lodash `.pick()` function approach and the Object Desctruct approach. **Special JS Feature/Syntax** There is no special JavaScript feature or syntax mentioned in this benchmark.
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