Use the profiler to see where the time is being spent. If your attempt to use List had poor scrolling it implies that your post renderer is inefficient.
Alex Harui Flex SDK Developer Adobe Systems Inc.<http://www.adobe.com/> Blog: http://blogs.adobe.com/aharui From: flexcoders@yahoogroups.com [mailto:flexcod...@yahoogroups.com] On Behalf Of yial2 Sent: Friday, June 19, 2009 3:50 PM To: flexcoders@yahoogroups.com Subject: [flexcoders] Performance improvement recommendation Hi everyone, I am creating an application which is basically a flex/flash based blog engine. When the application is initially loaded, it will retrieve 50 blog post and display them on the first page. The problem I am having now is that it takes a LONG(5 min) time to load the posts. If I decrease the posts number down to 5, the load time is within an acceptable level(7 seconds). However, 5 posts per page is just not acceptable. I will try my best to describe the blog post structure in the following... 1. Each blog post can have pictures and text in it. Each post also has "comments" attach to the bottom. Following is a diagram illustrating what a post would look like ************************ * abc dummy text * * (picture) * * xyz dummy text * * (picture2) (picture3)* ************************ *Comment 1 * ************************ ************************ *Comment 2 * ************************ ************************ *Comment 3 * ************************ 2. Each post will have variable height due to different content and different number of comments Currently, I put 50 posts in a vbox, and the vbox height is set to 768. The vbox wil have a vertical scroll bar for user to scroll down to see the older posts. Since vbox will render "everything" before the component can be visually displayed, I can understand why it takes such a long time. I have tried to modify the code to use variable height "List" with custom itemRenderer instead, but the scroll on the list is NOT smooth at all due to itemRenderer recycle and re-render with new data. I am running out of ideas now. Many sites(facebook, blogger, or any other blog site) made this easy with PHP/.NET/HTML utilizing "div"+AJAX, but what is the best approach with Flex when constructing a blog engine application? Any suggestion/help will be greatly appreciated. Thanks!
