Benchmark: Get-Set object prop in 2-each-times vs trim in 1-each-time

Script Preparation code:

function aLoop(nodes, fn) {
  for (var i=0, len=nodes.length;  i<len;  i++) {
    fn(nodes[i], i, nodes);
  }
}
var nodes = document.querySelectorAll('div');
var arr1 = [1,2,3];
var classs;

Tests:

Get-Set object prop in 2-each-times
aLoop(nodes, function(elm){ aLoop(arr1, function(item){ classs = elm.className; elm.className = classs+'temp'; }); });
Get-Set-trim in 1-each-time
aLoop(nodes, function(elm){ classs = elm.className; aLoop(arr1, function(item){ classs = classs+'temp'; }); elm.className = classs.trim(); });

Rendered benchmark preparation results:

Suite status: <idle, ready to run>

Previous results

Test case name	Result
Get-Set object prop in 2-each-times
Get-Set-trim in 1-each-time

Fastest: N/A

Slowest: N/A

Latest run results:

Run details: (Test run date: 3 years ago)

User agent: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.75 Safari/537.36

Browser/OS: Chrome 68 on Windows 7

View result in a separate tab

Test name	Executions per second
Get-Set object prop in 2-each-times	1323.9 Ops/sec
Get-Set-trim in 1-each-time	1330.2 Ops/sec

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

LLMs can make mistakes. Check important info.

**Benchmark Overview**

The provided JSON represents a benchmark test for JavaScript performance, specifically focused on getting and setting an HTML element's class property. The test consists of two individual test cases: "Get-Set object prop in 2-each-times" and "Get-Set-trim in 1-each-time".

**Test Case 1: Get-Set object prop in 2-each-times**

This test case involves calling the `aLoop` function twice, once for each array element (`arr1`). In the inner loop, a class property is set to a new value by concatenating it with "temp". Then, the original class property is retrieved from the outer loop's context and assigned to the element.

**Test Case 2: Get-Set-trim in 1-each-time**

This test case involves calling the `aLoop` function once, where after setting a new value for the class property (similarly as in Test Case 1), the trimmed version of the original class property is set on the element.

**Options Compared**

The two test cases compare the following approaches:

*   **Get-Set object prop in 2-each-times**: This approach sets the class property twice, once for each iteration.
*   **Get-Set-trim in 1-each-time**: This approach sets the trimmed version of the original class property only once.

**Pros and Cons**

*   **Get-Set object prop in 2-each-times**:
    *   Pros:
        *   May be faster due to fewer string concatenations.
    *   Cons:
        *   Requires two iterations, which can increase overhead.
*   **Get-Set-trim in 1-each-time**:
    *   Pros:
        *   Only requires one iteration and uses the `trim` method, which may be more efficient for string manipulation.
    *   Cons:
        *   May involve additional overhead due to the trimmed version of the class property.

**Library Usage**

The test case utilizes a custom function called `aLoop`, but no external libraries are required. However, it does rely on JavaScript's built-in `document.querySelectorAll` method to select HTML elements.

**Special JS Feature or Syntax**

None mentioned in this explanation.

Related benchmarks:

Get-Set object prop in 2-each-times vs trim in 1-each-time (version: 3)

Comparing performance of: Get-Set object prop in 2-each-times vs Get-Set-trim in 1-each-time

Created: 3 years ago by: Registered User

Jump to the latest result

Get-Set object prop in 2-each-times

Get-Set-trim in 1-each-time

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):