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Array concat vs spread operator vs push (work)
(version: 0)
Compare the new ES6 spread operator with the traditional concat() method and push
Comparing performance of:
Array.prototype.concat vs spread operator vs Push
Created:
4 years ago
by:
Guest
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Tests:
Array.prototype.concat
var params = [ "hello", true, 7 ]; var other = [ 1, 2 ].concat(params);
spread operator
var params = [ "hello", true, 7 ] var other = [ 1, 2, ...params ]
Push
var params = [ "hello", true, 7 ]; var other = [ 1, 2 ]; other.push(...params)
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Suite status:
<idle, ready to run>
Run tests (3)
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Test case name
Result
Array.prototype.concat
spread operator
Push
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! **What is tested on the provided JSON?** The provided JSON represents a benchmark test case that compares three different approaches to concatenate arrays in JavaScript: 1. **Array.prototype.concat()**: This is an older method for concatenating arrays, which was widely used before the introduction of the spread operator. 2. **Spread operator (`...`)**: This is a new syntax introduced in ES6 that allows you to expand an array into its elements. 3. **Push with spread operator (`push(...array)`)**: This approach uses the push() method to add elements from another array to the end of the current array. **What options are compared?** The benchmark test case compares the performance of these three approaches: * `Array.prototype.concat()` * Spread operator (`...`) * Push with spread operator (`push(...array)`) **Pros and cons of each approach:** 1. **Array.prototype.concat()**: * Pros: Simple, widely supported, and well-documented. * Cons: Can be slow for large arrays due to its overhead. 2. **Spread operator (`...`)**: * Pros: Efficient, modern, and concise. * Cons: May not work as expected in older browsers or with certain libraries. 3. **Push with spread operator (`push(...array)`)**: * Pros: Similar performance to the spread operator and is more widely supported. * Cons: Less readable than other approaches due to its unconventional syntax. **Library usage** There are no libraries used in this benchmark test case. **Special JS feature or syntax** The spread operator (`...`) is a relatively new syntax introduced in ES6. It allows you to expand an array into its elements, making it more concise and expressive than traditional concatenation methods. **Other alternatives** If the developers want to explore other approaches, they could consider using: * **Array.prototype.push.apply()**: This method applies the push() method to multiple arrays. * **String.join()**: This method combines an array of strings into a single string. However, it's worth noting that these alternatives may have different performance characteristics and might not be as efficient or readable as the approaches tested in this benchmark.
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