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concat vs lodash.concat vs spread
(version: 0)
Comparing performance of:
Array.prototype.concat vs Lodash concat vs Spread
Created:
7 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:
Array.prototype.concat
var params = [ "hello", "hello", "sname" ]; var other = [ "red", "wine" ].concat(params);
Lodash concat
var params = [ "hello", "hello", "sname" ]; var other = _.concat([ "red", "wine" ], params);
Spread
var params = [ "hello", "hello", "sname" ]; var other = [ "red", "wine", ...params ]
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (3)
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Test case name
Result
Array.prototype.concat
Lodash concat
Spread
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 test cases. **What is being tested?** MeasureThat.net is testing three different approaches to concatenate arrays: `Array.prototype.concat`, `lodash.concat`, and using the spread operator (`...`). **Options compared:** 1. **Array.prototype.concat**: This method uses the `concat()` function on the `Array` prototype, which returns a new array with the elements of the original array and the additional array. 2. **Lodash concat**: This method uses the `_concat()` function from the Lodash library, which is a utility library that provides various functions for functional programming. 3. **Spread operator (`...`)**: This method uses the spread operator to create a new array with the elements of the original array and the additional array. **Pros and cons of each approach:** 1. `Array.prototype.concat`: * Pros: Efficient, widely supported, and easy to use. * Cons: It creates a new array, which can be memory-intensive for large datasets. 2. `Lodash concat`: * Pros: Provides a convenient way to concatenate arrays with a single function call, can handle complex concatenation scenarios. * Cons: Requires the Lodash library to be included in the test code, which adds overhead. 3. **Spread operator (`...`)**: * Pros: Creates a new array with minimal memory allocation, efficient and lightweight. * Cons: Only supported in modern browsers and Node.js environments. **Library usage (Lodash)** Lodash is a utility library that provides various functions for functional programming. In this benchmark, the `_concat()` function is used to concatenate arrays. **Special JS feature (none)** There are no special JavaScript features or syntaxes being tested in this benchmark. **Other alternatives** If the spread operator (`...`) is not supported in the test environment, other alternatives can be considered: * `Array.prototype.push()`: This method appends elements to an array and returns the updated length of the array. It can be used with a loop or recursion. * `Array.prototype.concat()` with a callback function: Similar to `Array.prototype.concat()`, but uses a callback function to concatenate the arrays. Keep in mind that these alternatives may have different performance characteristics compared to the spread operator (`...`).
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