IE9 will feature a new version of the same rendering engine in IE 8, which is called
Trident, rather than a brand new engine. IE 8, like
all the other browsers, uses the standard Windows graphics system, GDI – which
makes the CPU do all the work. The latest generation of the Windows graphics
system is DirectX, which is used for the Aero graphics interface in Windows, and for games. If your system has a graphics card, or even an integrated
graphics chipset that can do DirectX hardware acceleration (which very many PCs
now have), IE 9 will use that instead.
In this example, the map scrolls quickly as you move across the screen – at a rate of over 60 frames per second. The CPU load is much lower because the graphics card is doing the work. Web sites don’t need to make any changes in order for IE9 to work in this way.