[LLVMdev] RFC: GLIBCXX_DEBUG ScheduleDAG Patch

[David Greene]

On Monday 21 January 2008 10:41, David Greene wrote:

> > >> Can you clarify? Is this 1.7% slowdown of scheduling time or overall
> > >> codegen time? If it's the later, then it seems a bit too much. Also,
> > >> please test it with all the MultiSource/Applications.
> > >
> > > It's 1.7% overall.
> >
> > That seems somewhat steep. Can you see how much of the scheduling
> > slow down there is?
>
> I got some times from the nightly report, so this is overall compile time.
>
> The worst slowdown is on timberwolfmc "llc compile" which has a 5%
> slowdown.  The JIT slows down 6%.
>
> Everything else looks to be 1% or less.  In some cases the times with
> the change are better, probably because this change gets rid of the "pop
> everything off and push it back on" way of recreating the heap.[

Just want to send a ping on this.  This patch is still waiting to go in.  Is 
the compile time hit too much?  Note that sometimes compile time
improves with this patch.

I'd like to get this in ASAP so I can start merging other things back to
upstream.

                                                      -Dave