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Lodash object mapping vs native mapping with Obect.entries
(version: 0)
Compare the performance of Lodash object map method to using native Object.entries.
Comparing performance of:
Object.entries and Array.map vs Lodash map
Created:
5 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:
Object.entries and Array.map
const stats = { size: 5, age: 37, length: 10 }; const result = Object.fromEntries( Object.entries(stats).map(([key, value]) => [key, value * 3]) );
Lodash map
const stats = { size: 5, age: 37, length: 10 }; const result = _.mapValues(stats, (val) => val * 3);
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
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Test case name
Result
Object.entries and Array.map
Lodash map
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's dive into the JavaScript microbenchmarking world of MeasureThat.net. **Overview** The benchmark provided compares two approaches to perform object mapping: using Lodash's `mapValues` method versus using native `Object.entries` and `Array.map`. The test is designed to measure the performance difference between these two methods in a JavaScript engine. **Options Compared** Two options are compared: 1. **Lodash's `mapValues` method**: This method is part of the Lodash library, which provides a utility function for mapping values in an object. 2. **Native `Object.entries` and `Array.map` combination**: This approach uses the `Object.entries` method to extract key-value pairs from an object, maps over the resulting array using `Array.map`, and then creates a new object with the transformed key-value pairs. **Pros and Cons** **Lodash's `mapValues` method:** Pros: * Provides a concise and readable way to perform object mapping. * Often results in more efficient code due to optimizations implemented by Lodash. Cons: * Introduces an external dependency on the Lodash library, which may not be desirable for every project. * May incur additional overhead due to the library's initialization and garbage collection requirements. **Native `Object.entries` and `Array.map` combination:** Pros: * Does not introduce any external dependencies. * Can result in more efficient code if implemented carefully, as it avoids the overhead of a library function call. Cons: * Requires a deeper understanding of JavaScript object iteration and array manipulation techniques. * May be less readable or maintainable for some developers due to its explicit nature. **Library Used** Lodash is a popular JavaScript utility library that provides a wide range of functions for tasks such as array manipulation, object transformation, and more. In this benchmark, Lodash's `mapValues` method is used to perform the object mapping. **Special JS Feature or Syntax** None are mentioned in the provided code snippets, so we can assume they are standard JavaScript features. **Other Alternatives** If you're looking for alternative libraries or approaches for performing object mapping, consider: * Using a different utility library, such as Ramda or Immutable.js. * Implementing your own object mapping function using `Object.keys()`, `Array.prototype.forEach()`, and other basic JavaScript techniques. * Leveraging modern JavaScript features like template literals, spread operators, or destructuring to simplify object manipulation. For the specific problem of comparing object mapping performance, you may also consider using a benchmarking library like Benchmark.js or Microbenchmark to create more comprehensive benchmarks.
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native map vs lodash map on large array
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