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Real situation
(version: 0)
Comparing performance of:
ID vs Closest
Created:
3 years ago
by:
Guest
Jump to the latest result
HTML Preparation code:
<div class="wrapper" id="wrapper"> <div id="slot"></div> </div>
Tests:
ID
let el2 = document.getElementById('wrapper');
Closest
let el1 = document.getElementById('slot'); let el2 = el1.closest('.wrapper');
Rendered benchmark preparation results:
Suite status:
<idle, ready to run>
Run tests (2)
Previous results
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Test case name
Result
ID
Closest
Fastest:
N/A
Slowest:
N/A
Latest run results:
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Autogenerated LLM Summary
(model
llama3.2:3b
, generated one year ago):
Let's break down the benchmark and explain what's being tested. **Benchmark Overview** The benchmark is designed to measure the performance of JavaScript code that interacts with the DOM (Document Object Model) in modern web browsers. The test cases focus on two specific scenarios: 1. **ID**: This test case measures the time it takes to retrieve an HTML element using its ID. 2. **Closest**: This test case measures the time it takes to find the closest ancestor of a given element that matches a certain class. **Options Compared** In both test cases, the same basic approach is used: * The `document.getElementById()` method is called to interact with the DOM. * In the "ID" test case, only the ID itself is specified as part of the selector (e.g., `document.getElementById('wrapper')`). * In the "Closest" test case, two elements are involved: the original element (`el1`) and its closest ancestor that matches a class (`el2 = el1.closest('.wrapper')`). **Pros and Cons of Different Approaches** 1. **Single-element ID lookup**: This approach is simple and efficient for finding an exact match using an ID. * Pros: Fast, accurate, and easy to implement. * Cons: May not be suitable for more complex scenarios where multiple elements with the same ID exist. 2. **Closest ancestor lookup**: This approach finds the closest ancestor of a given element that matches a class or tag name. * Pros: Useful for scenarios where multiple elements have the same class, and you need to find the closest match. * Cons: May be slower due to the additional lookup and traversal steps. **Libraries and Special JS Features** In this benchmark, there are no external libraries used. However, the test cases do rely on modern JavaScript features: 1. **Arrow functions**: The `let el2 = document.getElementById('wrapper');` line uses an arrow function ( implicit or explicit) to define a simple function. 2. **Template literals**: The HTML preparation code uses template literals (`"\r\n <div id=\"slot\"></div>\r\n"`) to create a string. **Other Alternatives** For measuring DOM interactions and JavaScript performance, other benchmarking frameworks and tools exist, such as: 1. **Benchmark.js**: A popular, open-source benchmarking framework for Node.js and browser-based environments. 2. **Benchpress**: Another popular benchmarking library for JavaScript and other programming languages. 3. **Google's raptor.js**: An optimized benchmarking library designed specifically for JavaScript performance measurements. These alternatives may offer different features, APIs, or approaches to measuring performance, but they all aim to help developers optimize their code for better execution times and resource usage.
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