Benchmark: new singleton set

Tests:

initialize with array
const a = new Set(["a"])
initialize empty, then add
const a = new Set() a.add("a")

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
initialize with array
initialize empty, then add

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: one year ago)

User agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/114.0.0.0 Safari/537.36

Browser/OS: Chrome 114 on Mac OS X 10.15.7

View result in a separate tab

Test name	Executions per second
initialize with array	12578359.0 Ops/sec
initialize empty, then add	13637113.0 Ops/sec

Autogenerated LLM Summary (model llama3.2:3b, generated one month ago):

LLMs can make mistakes. Check important info.

Let's break down what's being tested in this benchmark.

The provided JSON represents two test cases for measuring the performance of creating and manipulating `Set` objects in JavaScript. A `Set` is a collection of unique values, similar to an array, but with some key differences:

*   Sets are unordered, meaning their elements are not necessarily stored in any particular order.
*   Sets do not allow duplicate values, so adding the same value multiple times has no effect on the set.
*   Sets have fast lookup and insertion operations.

The benchmark tests two different approaches to creating a `Set` object:

1.  **Initializing an empty Set**: This approach creates a new `Set` object without any elements. The test case uses the following code: `"const a = new Set()"`.
    *   Pros:
        *   Simple and straightforward way to create a new, empty `Set`.
        *   No overhead due to initial element population.
    *   Cons:
        *   Potential overhead due to setting up the `Set` object's internal state.
2.  **Initializing a Set with an array**: This approach creates a new `Set` object and adds elements to it from an array. The test case uses the following code: `"const a = new Set([\"a\"])"` or `"const a = new Set()\r\na.add(\"a\")"`.
    *   Pros:
        *   Can be more efficient if the array is large, since it avoids creating intermediate objects and copying values.
        *   Reduces potential overhead due to setting up the `Set` object's internal state.
    *   Cons:
        *   May incur additional overhead due to parsing and processing the array elements.
        *   Requires an initial operation (adding all elements) that might not be necessary if only one element is added.

In both test cases, the goal is to measure the execution time of creating and manipulating a `Set` object. The benchmark likely aims to identify which approach is faster and more efficient for common use cases.

Regarding special JavaScript features or syntax:

*   **Arrow functions**: There is no indication that this benchmark uses arrow functions, which are used for concise function definitions.
*   **Classes**: There is also no indication of class usage in the provided code snippets.

Related benchmarks:

new singleton set (version: 0)

Comparing performance of: initialize with array vs initialize empty, then add

Created: one year ago by: Guest

Jump to the latest result

initialize with array

initialize empty, then add

Suite status: <idle, ready to run>

Experimental features:

Fastest: N/A

Slowest: N/A

Autogenerated LLM Summary (model llama3.2:3b, generated one month ago):