The issue with E-Bay is mostly due to their heavy use of Adobe Flash Player 10. That's what sucks up all that CPU since regular HTML rendering takes a trivial amount of CPU and memory capacity. This issue can also be impacted by how well the Adobe Flash Player interacts with your browser and OS. I'm running Safari 4.0.3 on Snow Leopard 10.6.1 with Adobe Flash Player 10 and it's very responsive, even with multiple tabs open with other tabs running video streaming. This was not the case with Snow Leopard 10.6 (RTM) and the previous version of Safari. The current Safari/Flash 10 combination is now noticeably faster than the Firefox/Flash 10 combination on my Mac. On my Windows 7 (RTM) netbook running Chrome 3 with Flash 10, E-Bay's site is downright snappy even with a measly Atom processor and only 2 GB of RAM.
I guess you can blame E-Bay for putting a lot of Flash content on their web site. But more and more sites are doing it in their quest to provide a slicker and more visually appealing user experience. This just means that you'll need a reasonably fast computer with as much general purpose and video processing capacity and memory as you can stuff in it and as fast of an Internet connection as you can afford if you want to enjoy the (or being subjected to) the online experience that web sites are providing these days. Then you have to find the right combination of operating system, browser, and flash player plug-in (which in turn is also dependent on the underlying Java runtime environment) to get everything running smoothly. Then you have to hope that one of the many system, browser, and plug-in updates that are getting pushed down to your computer doesn't break the magic combination that works well.
Keep in mind that these big browser plug-ins, like Adobe Flash (and AIR), Microsoft Silverlight, and JavaFX are really like small operating systems. That's "small" by today's behemoth OS perspective. By legacy OS standards, they are larger than most older operating systems. The system requirements for some of these plug-ins may exceed the system requirements for your base operating system.
I guess you can blame E-Bay for putting a lot of Flash content on their web site. But more and more sites are doing it in their quest to provide a slicker and more visually appealing user experience. This just means that you'll need a reasonably fast computer with as much general purpose and video processing capacity and memory as you can stuff in it and as fast of an Internet connection as you can afford if you want to enjoy the (or being subjected to) the online experience that web sites are providing these days. Then you have to find the right combination of operating system, browser, and flash player plug-in (which in turn is also dependent on the underlying Java runtime environment) to get everything running smoothly. Then you have to hope that one of the many system, browser, and plug-in updates that are getting pushed down to your computer doesn't break the magic combination that works well.
Keep in mind that these big browser plug-ins, like Adobe Flash (and AIR), Microsoft Silverlight, and JavaFX are really like small operating systems. That's "small" by today's behemoth OS perspective. By legacy OS standards, they are larger than most older operating systems. The system requirements for some of these plug-ins may exceed the system requirements for your base operating system.