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Javascript Push
(version: 0)
Comparing performance of:
Array Push vs Array Spread
Created:
5 years ago
by:
Guest
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Script Preparation code:
var array = [1,2,3];
Tests:
Array Push
array.push(5)
Array Spread
array = [...array, 5]
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
Array Push
Array Spread
Fastest:
N/A
Slowest:
N/A
Latest run results:
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
**What is being tested?** The provided JSON represents two individual test cases, each testing the performance of JavaScript arrays. Specifically: 1. **Array Push**: Measures the execution time of `array.push(5)`. 2. **Array Spread**: Measures the execution time of `[...array, 5]` (using array spread syntax). **Comparison options** The provided benchmark compares two approaches to adding an element to an array: 1. **Using the `push()` method**: This is a built-in JavaScript method that adds one or more elements to the end of an array. 2. **Using array spread syntax**: This involves creating a new array by spreading the existing array and then appending the new element. **Pros and Cons** **Array Push:** Pros: * Native support in all JavaScript engines * Generally faster, as it modifies the original array in place Cons: * May not be as readable or maintainable for large arrays **Array Spread:** Pros: * More readable, especially for larger arrays * Can be more efficient than `push()` when dealing with very large arrays (since it creates a new array without modifying the original) Cons: * Requires JavaScript engine support for array spread syntax (introduced in ECMAScript 2015) * May be slightly slower due to the overhead of creating a new array **Library usage** There is no library used in these benchmark tests. **Special JS feature or syntax** The use of array spread syntax (`[...array, 5]`) is a special JavaScript feature introduced in ECMAScript 2015. It allows for more concise and expressive array creation. **Other alternatives** If you want to test other approaches to adding elements to an array, some alternative options could include: * Using the `concat()` method: `array.concat([5])` * Using a temporary variable: `var temp = [5]; array.push(temp)` * Using a loop: `for (var i = 0; i < 1; i++) { array[i] = 5; }` Keep in mind that these alternatives may not be as efficient or readable as the original approaches being tested. **Benchmark preparation code** The provided script preparation code creates an initial array `[1,2,3]`, which is used as input for both test cases: ```javascript var array = [1,2,3]; ``` This ensures that both test cases start with a consistent starting point.
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