arr = []
arr[arr.length] = "Something";
arr[arr.length] = "Another thing";
arr.push("Something");
arr.push("Another thing");
--enable-precise-memory-info
flag.
Test case name | Result |
---|---|
normal | |
push |
Test name | Executions per second |
---|---|
normal | 274458.7 Ops/sec |
push | 506997.2 Ops/sec |
Let's break down the provided JSON to understand what is being tested in the benchmark.
Benchmark Definition
The benchmark definition provides metadata about the test, including:
Name
: The name of the benchmark, which is "Array.push".Description
: An empty string, indicating that there is no description for this benchmark.Script Preparation Code
and Html Preparation Code
: These are used to prepare the test script before running it. In this case, they both set up an array variable arr
with an initial value of an empty array.Test Cases
There are two individual test cases:
push()
method provided by modern JavaScript engines, which is more concise and efficient than the traditional way of adding elements to an array.Comparison of Options
The two test cases compare the performance of using the traditional syntax (normal
) versus the modern push()
method (push
). Here's a brief analysis of the pros and cons of each approach:
Library
There is no explicit library mentioned in the benchmark definition. However, it's likely that the test uses the built-in JavaScript Array
class or a polyfill to provide the array functionality.
Special JS Feature/Syntax
The test case uses the push()
method, which is a modern JavaScript feature introduced with ECMAScript 5. This syntax is widely supported across modern browsers and JavaScript engines.
Alternatives
If you were to rewrite this benchmark using alternative approaches, here are some options:
push()
method or traditional syntax, you could write a loop that adds elements to the array manually. This would likely be less efficient than both options.push()
method.push()
method versus traditional syntax.Keep in mind that these alternative approaches might not be as relevant or interesting for this specific benchmark, and the focus should remain on comparing the performance of the two test cases.