The issue that we know about has no effect at all on speed. Downgrading to v2.1.4 will certainly stop the status display 'update' issue, but -- again -- no speed issue, and I'm unaware of any actual 'problem' with speed in SD.
Other things, though, like Spotlight, AntiVirus, etc could cause problems, of course. As could hardware issues.
__________________
--Dave Nanian
|