New Window taking Many Times Longer in Windows than Mac to Open

Thanks, Tim, but as I use Windows that isn’t what I was asking. What I was asking is if the XojoInstruments package is the Windows equivalent of what Beatrix was referring to.

XojoInstruments might have been inspired by Xcode Instruments but they are two completely different beasts.
As far as I’m aware there is no obvious equivalent on MS-Windows that you can use with Xojo.