On Sun, Jan 19, 2014 at 9:47 PM, Mike Frysinger <vap...@gentoo.org> wrote:
> On Sunday 19 January 2014 11:59:36 Mike Gilbert wrote: > > On Sun, Jan 19, 2014 at 4:44 AM, Mike Frysinger <vap...@gentoo.org> > wrote: > > > Chromium OS for a long time was restricted to EAPI 4 for two reasons -- > > > it had an old portage version (and upgrading to a newer one regressed > > > performance significantly, so we held off until we could figure out > why) > > > > I am curious to know more about the performance regression if you can > > share. Is that something that got fixed, or did you disable some > > features (like the slot-operator stuff)? > > we finally tracked it down (was due to new the new FEATURES=merge-sync > option. > when you're installing 200 to 500 binary packages (with like 32 in > parallel), > that can easily choke your throughput. some systems saw really excessive > latencies (which i would guess was due to their drive taking longer to > process > dirty blocks). but it took us some time to figure that out as we were > making a > large version jump and we didn't have too much time to dedicate to > tracking it > down. lots o bugs to fix. > -mike > Are you still doing crazy crap like disabling all of the portage locking? ;p -A
