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Array.prototype.concat vs spread operator (withouth JQuery)
(version: 0)
Compare the new ES6 spread operator with the traditional concat() method
Comparing performance of:
Array.prototype.concat vs spread operator
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 ]
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Suite status:
<idle, ready to run>
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Test case name
Result
Array.prototype.concat
spread operator
Fastest:
N/A
Slowest:
N/A
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
I'll break down the benchmark and its results in a way that's easy to understand for software engineers of various skill levels. **Benchmark Overview** The benchmark compares two approaches to merge arrays in JavaScript: 1. `Array.prototype.concat()` 2. The new ES6 spread operator (`...`) **Options Compared** * `Array.prototype.concat()`: This is the traditional method used to merge arrays. * Spread operator (`...`): This is a newer way of merging arrays introduced in ECMAScript 2015. **Pros and Cons of Each Approach** ### Array.prototype.concat() Pros: * Well-established and widely supported. * Easy to understand and use, especially for those familiar with array methods. Cons: * Can be slower due to the overhead of creating an intermediate array. * Creates a new array, which can lead to higher memory usage. ### Spread Operator (`...`) Pros: * Faster than `concat()` because it avoids creating an intermediate array. * More concise and expressive way to merge arrays. Cons: * Less widely supported (older browsers might not understand the syntax). * May be less intuitive for those without experience with spread operators. **Library/Functionality Used** In this benchmark, no specific library or function is used. The focus is solely on comparing two built-in JavaScript features: `Array.prototype.concat()` and the spread operator (`...`). **Special JS Feature/Syntax** The spread operator (`...`) is a special syntax introduced in ECMAScript 2015 (ES6). It allows you to create new arrays by spreading existing arrays or array-like objects. **Other Considerations** * The benchmark uses Firefox 98 as the test browser, which supports ES6 features. * The `TestName` field suggests that this is a general-purpose benchmark, not specific to any particular use case or library. **Alternatives** If you're interested in similar benchmarks or want to explore other ways to merge arrays, consider the following alternatives: 1. Using `Array.prototype.push()` and `Array.prototype.length`: This method can be slower than the spread operator but is still supported by most browsers. 2. Using a custom implementation: You could write your own function to merge arrays using loops or other techniques. However, this would likely result in slower performance compared to the built-in methods. In summary, the MeasureThat.net benchmark provides a useful comparison between two common ways to merge arrays in JavaScript: `Array.prototype.concat()` and the spread operator (`...`). By understanding the pros and cons of each approach, you can make informed decisions about which method to use in your own projects.
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