Is there any documentation on the file types that are costly to check for anti-virus? For now VMDK and ISO come to mind. Also on a Mac, the extension for ISOs is usually .cdr which is the default extension Apples Disk Utility appends when ripping CD/DVD media.
For performance reasons, I would expect users to add large file types to their AV extensions exclude list.
Are there anti-virus applications on the Mac? I would have expected the lack of viruses on that platform to have killed this market
You might want to add .vmem if you use virtual machines with a lot of virtual RAM. I cannot think of any other extension for large files at this point.
We are also thinking about registering these large files as "not backupable by Time Machine" in Leopard.