I've come across an issue when clicking on folders in All Programs that have about a lot of sub-folders or shortcuts inside them. For example, the 3DPlanesoft one has 20 sub-folders which contain 4-5 shortcuts in them and it will freeze the Start menu in place for 30-90 seconds. During this time, the menu is unresponsive and even states "Not responding" if I repeatedly click on it. All these screensavers are installed in the same C:\Program Files (x86)\3Planesoft folder with the executables in the C:\Windows\SysWOW64 folder. This issue never occurred on Windows 7, ever. It eventually unfreezes after about a minute to a minute and half but in the meantime the Start menu is stubbornly displayed over everything and cannot be pushed to the background until it sorts itself out. Once it unfreezes then the All Programs menu can be accessed without further issue until I reboot.
I also have similar sluggish behaviour when opening the Games folder, set to display as a menu rather than a link, that contains around 90-100 entries yet it is reading entries from the Game Explorer folder on my C: drive (C:/Users/Administrator/AppData/Local/Microsoft/Windows/GameExplorer) and the HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\GameUX keys and not entries scattered all over my 256 GB Crucial m4 SSD. As such I don't understand quite why it is so slow compared with my previous Windows 7 install. On Windows 7, this same menu would always display within 5-10 seconds at most; in Windows 8 it's anything up to 90 seconds. If this only happened intermittently then I could live with but it happens everything when accessing this large folders.
Why is Start8 so slow on my system? Is it a bug due to inefficient caching? Or does my system have too many folders under All Programs and Games for Start8 to handle? These menus are EXACTLY the same as Windows 7 as I did an upgrade to Windows 8 Pro, choosing to keep all my settings and files. Also, Windows 8 is installed, as was Windows 7, on an SSD!