Performance issues with jQuery during complex DOM manipulations in staging environment
I'm writing unit tests and I'm integrating two systems and Hey everyone, I'm running into an issue that's driving me crazy... I'm working on a personal project and Recently started working with a project that heavily utilizes jQuery for DOM manipulations and AJAX calls. While profiling the application in our staging environment, I've noticed significant performance degradation, particularly when executing batch updates to the DOM. For instance, I'm using the following code to append multiple elements to a list: ```javascript for (let i = 0; i < 1000; i++) { $('#myList').append('<li>Item ' + i + '</li>'); } ``` This approach seems to cause jQuery to slow down as it has to reflow and repaint the DOM with each append call. In an attempt to improve performance, I switched to building the HTML string first and then appending it in one go: ```javascript let items = ''; for (let i = 0; i < 1000; i++) { items += '<li>Item ' + i + '</li>'; } $('#myList').append(items); ``` Although this reduces the number of reflows, the performance is still not where it should be. I then tried using the `DocumentFragment` approach: ```javascript let fragment = document.createDocumentFragment(); for (let i = 0; i < 1000; i++) { const li = document.createElement('li'); li.textContent = 'Item ' + i; fragment.appendChild(li); } $('#myList').append(fragment); ``` While `DocumentFragment` improved the performance a bit, it remains suboptimal, with frames dropping when scrolling due to the jQuery overhead. I suspect the issue may be exacerbated by other jQuery plugins we're using that manipulate the DOM concurrently. Has anyone experienced similar issues with jQuery performance during bulk DOM updates? Are there any best practices or specific configurations that could help mitigate these bottlenecks in a staging setup? Also, are there any tools you would recommend for deeper profiling of jQuery performance on the frontend? My development environment is Windows. Is there a better approach? For context: I'm using Javascript on Debian. I'm coming from a different tech stack and learning Javascript. I'm open to any suggestions. Has anyone else encountered this?