Convert to avoid using Filters

Source: http://www.ued163.com /? P = 658

The unique attribute of IE alphaimageloader is used to modify the translucent Effect of PNG images in versions earlier than 7.0. The problem with this filter is that when the browser loads an image, it terminates the rendering of the content and freezes the browser. Each element (not just an image) is computed once, increasing memory spending. Therefore, it has many problems.
The best way to avoid using alphaimageloader is to use the png8 format, which can work well in IE. If you really need to use alphaimageloader, use the underline _ filter to invalidate IE7 or later versions.

This is one of Yahoo's best performance experiences, but the effect of filters on page performance is huge. Currently, there seems to be no formal test results for reference. Do you know?