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array_concat_sprad
(version: 0)
Comparing performance of:
Concat vs Spread
Created:
7 years ago
by:
Guest
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Tests:
Concat
var params = [ "hello", true, 7 ]; var other = [ 1, 2 ].concat(params);
Spread
var params = [ "hello", true, 7 ] var other = [ 1, 2, ...params ]
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
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Test case name
Result
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 dive into the world of JavaScript microbenchmarks! **Benchmark Overview** MeasureThat.net is a website that allows users to create and run JavaScript microbenchmarks. The benchmark in question, `array_concat_sprad`, tests the performance of two different approaches to concatenate arrays: using the `.concat()` method and using the spread operator (`...`). **Script Preparation Code and Html Preparation Code** The provided JSON indicates that no script preparation code or HTML preparation code is required for this benchmark. This means that the test cases are designed to be simple and focus solely on the JavaScript syntax. **Test Cases** There are two test cases: 1. **Concat**: This test case uses the `.concat()` method to concatenate an array `params` with another array `other`. The script defines `params` as `[ "hello", true, 7 ]` and then uses `.concat()` to merge it with `other`. 2. **Spread**: This test case uses the spread operator (`...`) to concatenate an array `params` with another array `other`. The script defines `params` as `[ "hello", true, 7 ]` and then uses the spread operator to merge it with `other`. **Options Compared** The two options being compared are: 1. `.concat()` method 2. Spread operator (`...`) **Pros and Cons of Each Approach** 1. `.concat()` method: * Pros: Widely supported, easy to read and write, and well-documented. * Cons: Can be slower than the spread operator for large arrays, as it creates a new array object. 2. Spread operator (`...`): * Pros: Faster than `.concat()`, especially for large arrays, as it avoids creating a new array object. * Cons: Less intuitive and less widely supported compared to `.concat()`. **Library Usage** There is no library usage in these test cases. **Special JS Features or Syntax** Neither of the test cases uses any special JavaScript features or syntax beyond what is commonly found in modern JavaScript implementations. However, it's worth noting that some older browsers may not support the spread operator (`...`) or may have issues with its use. **Other Alternatives** If you were to implement an alternative approach to concatenate arrays, some options might include: * Using `Array.prototype.push()`: This method modifies the original array by pushing new elements onto it. * Using `Array.prototype.splice()`: This method modifies the original array by replacing or removing elements and inserting new ones at a specified position. However, these alternatives may not be as efficient or readable as the `.concat()` method or spread operator (`...`), and may also have different performance characteristics depending on the specific use case.
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