On Dec 15, 2011, at 7:13 PM, Tim Visher wrote: > Hi Everyone, > > I'm trying to figure out if I'm doing something wrong or if WebKit is > just inherently slow to render images. I have a javascript slide show > where I would like to display a serious of fixed position images in > quick succession. Firefox works very well and uses little to no CPU to > do this.
Sampling shows that WebKit is spending a lot of time downsampling the images (since you are shrinking them down), and doing color correction. Does Firefox do color correction on the images? Simon > > WebKit, however, chews up an entire core and displays the images at a > significantly slower rate than desired. > > It does this in WebKit nightly, Safari, and Chrome. > > I've published a [test page][1]. If I try [significantly simpler][2] > or [compressed to oblivion][3] images, WebKit seems to perform > alright. > > [1]: > http://random.twonegatives.com.s3-website-us-east-1.amazonaws.com/id-cycle-rendering-demo/ > [2]: > http://random.twonegatives.com.s3-website-us-east-1.amazonaws.com/id-cycle-rendering-demo/performant.html > [3]: > http://random.twonegatives.com.s3-website-us-east-1.amazonaws.com/id-cycle-rendering-demo/low-res.html > > I'd like it to perform well so I don't know if someone can suggest > something I could do to get good performance. > > If anyone reading this is on Stack Overflow, I've also published a > [question][4] there that hasn't gotten much traction yet, hence this > post. > > [4]: > http://stackoverflow.com/questions/8524241/how-can-i-optimize-images-to-render-efficiently-in-webkit > > Thanks in advance! _______________________________________________ webkit-help mailing list [email protected] http://lists.webkit.org/mailman/listinfo.cgi/webkit-help
