Re: hand-wave-y cache performance data

 > Do you guys think that it would be useful to get somebody to 
benchmark how
 > much overhead our cache introduces?  Doing this much worse with the cache
 > enabled is bad IMO.  A simple first step would be for somebody to submit
 > Talos runs on a try server job with the disk (and maybe mem) cache 
disabled
 > and compare some numbers...

Yes, Nick has been running those numbers (Talos needs tweaking as its 
default cache access pattern is not a useful benchmark--virtually no 
reuse within a single run).   On the hardware tested at least, the disk 
cache is a win, i.e. we don't want to turn it off, but the bug Taras 
points to definitely shows there are exceptions (encrypted partitions, 
very slow drives, etc.)/

Jason