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lodash.mapKeys vs Iterating over properties in for of loop in function
(version: 0)
Comparing performance of:
lodash.mapKeys vs native
Created:
5 years ago
by:
Guest
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HTML Preparation code:
<script src="https://cdn.jsdelivr.net/lodash/4.16.0/lodash.min.js"></script>
Script Preparation code:
var value = {a: 30310, b: 100303, c: 3040494};
Tests:
lodash.mapKeys
const f = v => _.mapKeys(v, k => k + '-changed') f(value);
native
const f = v => { const m = {}; for (const k of Object.keys(value)) m[k + '-changed'] = value[k]; return m; } f(value)
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
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Test case name
Result
lodash.mapKeys
native
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the benchmark and its options. The test case is comparing two approaches to transform an object by changing its property names using JavaScript: 1. **`lodash.mapKeys`**: This approach uses the `lodash` library, which provides a utility function `mapKeys` that applies a mapping function to each key of an object. 2. **Native iteration with `for...of` loop**: This approach uses native JavaScript features to iterate over the properties of an object and transform them. **Pros and Cons:** **Lodash `mapKeys`:** Pros: * Provides a concise and readable way to perform transformations on objects using a mapping function. * The library is well-maintained, widely used, and has a large community of contributors. * It abstracts away the underlying iteration mechanism, making it easier to reason about the code. Cons: * Introduces an external dependency (the `lodash` library), which may not be desirable for all projects or environments. * May have performance implications due to the overhead of calling a function from a library. **Native iteration with `for...of` loop:** Pros: * No external dependencies, making it more suitable for projects that want to avoid adding extra libraries. * Directly utilizes native JavaScript features, which may lead to better performance and more efficient code generation. * Easy to understand and maintain, as the logic is straightforward. Cons: * Requires a deeper understanding of JavaScript iteration mechanisms and the intricacies of property access. * The code can become verbose and harder to read due to the explicit loop structure. **Other Considerations:** * The use of `Object.keys()` to iterate over object properties might not be the most efficient approach, as it can lead to additional overhead due to the creation of a new array of keys. A native iteration with `for...of` loop avoids this potential issue. * Lodash's `mapKeys` function creates a new object and iterates over its entries, whereas the native approach directly transforms the original object. **Library and its purpose:** The library used in this benchmark is Lodash (`lodash`). Its primary purpose is to provide a set of utility functions for functional programming, data manipulation, and other common tasks. In this specific case, `mapKeys` is a function that applies a mapping function to each key of an object, returning a new object with transformed keys. **Special JavaScript feature or syntax:** This benchmark does not explicitly test any special JavaScript features or syntax beyond the standard iteration mechanisms and library usage.
Related benchmarks:
lodash.mapKeys vs Iterating over Object.keys
lodash.mapKeys vs Iterating over properties in for of loop
Object.keys vs lodash _.forEach
Loop over object: lodash vs Object.entries vs Object.keys vs Object.values
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