const arr1 = ['a', 'b', 'c']
arr1 = [arr1,'d']
const arr1 = ['a', 'b', 'c']
arr1.push('d')
--enable-precise-memory-info
flag.
Test case name | Result |
---|---|
Spread | |
Push |
Test name | Executions per second |
---|---|
Spread | 0.0 Ops/sec |
Push | 50020120.0 Ops/sec |
Let's break down the provided JSON benchmark data and explain what is tested, compared, and the pros/cons of different approaches.
Benchmark Overview
The benchmark measures the performance difference between two ways to add an element to an array: using the spread operator ([...arr1,'d']
) and pushing a new element onto the end of the array (arr1.push('d')
). The goal is to determine which approach is faster for small arrays.
Benchmark Definition
The benchmark definition JSON specifies that there is no specific code snippet to be executed, but instead, two pre-defined test cases are provided:
const arr1 = ['a', 'b', 'c']\r\narr1 = [...arr1,'d']
const arr1 = ['a', 'b', 'c']\r\narr1.push('d')
Comparison
In both test cases, the same initial array (const arr1 = ['a', 'b', 'c']
) is created and then modified by adding a new element.
Pros/Cons of Different Approaches
push
method, which can lead to reallocation of memory.Library/Functions Used
None are explicitly mentioned in this benchmark. However, the push
method is a built-in JavaScript function used by both test cases.
Special JS Features/Syntax
The benchmark does not use any special JavaScript features or syntax that requires specific explanation. It only uses basic JavaScript data structures and methods.
Other Alternatives
For measuring performance differences between array operations, you might also consider using other benchmarking frameworks or libraries, such as:
Keep in mind that different benchmarking tools might have varying results due to factors like environment, browser, and hardware.