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Array spread operator vs push
(version: 0)
Comparing performance of:
spread operator vs Push
Created:
6 years ago
by:
Guest
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Tests:
spread operator
var params = [ "hello", true, 7 ] var other = [ 1, 2, ...params ]
Push
var params = [ "hello", true, 7 ]; var other = [ 1, 2 ].push(...params);
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
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Test case name
Result
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 on MeasureThat.net. **Benchmark Overview** The provided benchmark compares two approaches for spreading an array in JavaScript: using the spread operator (`...`) and using the `push()` method with the spread operator (`...`). The goal is to determine which approach is faster and more efficient. **Options Compared** Two options are compared: 1. **Spread Operator (`...`)**: This approach uses the spread operator to create a new array by copying elements from an existing array. 2. **Push with Spread (`push(...)`)**: This approach uses the `push()` method to add elements to the end of an array, while also using the spread operator to copy elements from an existing array. **Pros and Cons** 1. **Spread Operator (`...`)**: * Pros: + More concise and readable code. + Often faster and more efficient, since it avoids the overhead of function calls. * Cons: + May not work as expected in all cases (e.g., with null or undefined values). 2. **Push with Spread (`push(...)`)**: * Pros: + More flexible and robust, since it can handle null or undefined values without throwing errors. * Cons: + Less concise and readable code. + May be slower than the spread operator due to the overhead of function calls. **Library Used** None are mentioned in this specific benchmark. However, in general, libraries like Lodash (`_.spread()`) or Array.prototype (`Array.prototype.push()` with spread) can be used for array manipulation. **Special JS Feature/Syntax** The spread operator (`...`) is a relatively new feature introduced in ECMAScript 2015 (ES6). It allows creating a new array by copying elements from an existing array, and has since become a standard part of the JavaScript language. The `push()` method with spread (`push(...)`), while not entirely new, has also gained popularity in recent years due to its flexibility and robustness. **Other Alternatives** Other alternatives for spreading arrays include: * Using `Array.prototype.concat()` or `Array.prototype.push.apply()` * Creating a new array using the `Array.from()` method * Using a library like Lodash (`_.spread()`) However, these approaches may have different performance characteristics and use cases compared to the spread operator and push with spread. **Benchmark Preparation Code** The provided `Script Preparation Code` is empty, which means that no specific setup or initialization code needs to be executed before running the benchmark. This allows MeasureThat.net to focus on measuring the execution time of the JavaScript code itself. I hope this explanation helps software engineers understand the basics of the JavaScript microbenchmark and its approaches!
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