Windows XP vs Windows 7 file size enumeration speed

[bhpaddock]

Arbitrary data point: On my spinning disk system performing the same operation (system32 directory) takes about 3-4 seconds (Win7 SP1 64-bit). And my set of files there is actually a bit larger.

[bhpaddock]

Well, for starters, the XP machine is enumerating far fewer files and of smaller size. Beyond that, there are a large number of factors at play here. For example, you may have other background activity happening on the Windows 7 system (or different file system filters installed, etc). Also the "Show more details" button is doing more work (calculating which properties make sense to show for this set, calculating the Date Created and Date Modified ranges, etc).