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compact vs map-if
(version: 0)
Comparing performance of:
compact vs map with if
Created:
4 years ago
by:
Guest
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HTML Preparation code:
<script src="https://cdn.jsdelivr.net/lodash/4.17.15/lodash.min.js"></script>
Script Preparation code:
var ops = [null, 1, 2, 3, 4, 5, null, null, null, 3, 4,5, 6, 34,341,2,2,2,1,212,21212,34,1,3112, null];
Tests:
compact
_.compact(ops)
map with if
_.map(ops, op => { if(!!op) return op })
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
compact
map with if
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 explain what's being tested. **Benchmark Overview** The test is designed to compare the performance of two approaches for compacting an array: using the `compact` function from Lodash (a utility library) versus using a simple `map` function with an inline `if` statement. **Lodash's `compact` Function** * Purpose: Remove all elements equal to `false` or `undefined` from an array. * Implementation details: The `compact` function iterates through the array, and for each element, it checks if the element is falsy (i.e., `false`, `0`, `''`, `null`, `undefined`). If the element is not falsy, it is returned in the new array. **Simple `map` with `if` Function** * Purpose: Filter elements from an array based on a condition. * Implementation details: The `map` function applies a transformation to each element of the original array. In this case, the transformation uses an inline `if` statement to check if the element is not falsy (`!!op`). If it's not falsy, the element is returned. **Options Compared** Two options are being compared: 1. **Lodash's `compact` function**: Using a well-tested and optimized library function. 2. **Simple `map` with `if` function**: A custom implementation using JavaScript's built-in functions. **Pros and Cons of Each Approach** * **Lodash's `compact` function**: + Pros: Well-tested, optimized, and likely to be more efficient due to the library's expertise in array manipulation. + Cons: Requires including an external library, which may add overhead for some tests. * **Simple `map` with `if` function**: + Pros: No external dependencies, easy to understand and implement. + Cons: May not be as efficient or optimized as the Lodash implementation. **Other Considerations** * The benchmark script uses a specific array of operations (`ops`) that is generated during preparation. This array is used to test both `compact` and `map` functions. * The `Html Preparation Code` includes a link to the Lodash CDN, which loads the required library for the `compact` function. **Special JavaScript Feature/Syntax** None are mentioned in this benchmark. **Alternatives** If you wanted to use alternative approaches, some options could be: 1. Using a different utility library, such as Underscore.js or Ramda. 2. Implementing the compact function manually using only built-in JavaScript functions (e.g., `filter`, `forEach`). 3. Using a different data structure, like a sparse array, to see if it affects performance. However, without more context or specific requirements, these alternatives might not be relevant or efficient for this particular benchmark.
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