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Array immutable union: lodash union vs uniq
(version: 0)
Comparing performance of:
lodash union vs lodash uniq
Created:
4 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 union
var a = [ 'a', 'b', 'c', 'd', 'e', 'f' ]; var b = [ 'b', 'd', 'a', 'e', 'f' ]; var c = _.union(a);
lodash uniq
var a = [ 'a', 'b', 'c', 'd', 'e', 'f' ]; var b = [ 'b', 'd', 'a', 'e', 'f' ]; var c = _.uniq(a);
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
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Test case name
Result
lodash union
lodash uniq
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
**Benchmark Explanation** MeasureThat.net is a platform that allows users to create and run JavaScript microbenchmarks. The provided JSON represents a benchmark test case that compares the performance of two JavaScript functions: `_union` from Lodash and `uniq` (a built-in function in some JavaScript implementations). The test case consists of creating two arrays, `a` and `b`, with overlapping elements. The benchmark measures the execution time taken by each function to find the union or unique elements between these two arrays. **Options Compared** Two options are compared: 1. **Lodash Union (`_union`)**: This function takes an array as input and returns a new array containing all unique elements from the original array. 2. **Unique (`uniq`)**: This is a built-in JavaScript function (available in some implementations) that removes duplicate values from an array. **Pros and Cons of Each Approach** 1. **Lodash Union (`_union`)`: * Pros: + Allows for more flexible comparison by allowing the input array to be modified. + Can handle nested arrays and objects. * Cons: + May introduce additional overhead due to the use of a library function. 2. **Unique (`uniq`)**: * Pros: + Built-in, so no external dependencies are required. + Typically faster since it's an intrinsic JavaScript function. * Cons: + Only available in some JavaScript implementations (e.g., Node.js, Chrome). + May not work as expected with non-array inputs. **Library Used** The `_.union` function is part of the Lodash library. Lodash is a popular utility library for JavaScript that provides various functions for tasks like array manipulation, object creation, and more. In this context, `_union` is used to compare its performance with the built-in `uniq` function. **Special JS Feature or Syntax** None are explicitly mentioned in this benchmark. **Other Alternatives** If `uniq` is not available, other alternatives can be: 1. Using a library like Lodash for the union operation (`_.difference()`). 2. Implementing a custom solution using JavaScript's built-in array methods (e.g., `filter()`, `map()`) to remove duplicates. 3. Using an alternative library or function that provides similar functionality, such as `_differenceBy()` from Lodash. Note that these alternatives may have different performance characteristics and trade-offs compared to the original benchmark.
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