[4.7 PATCH 00/18] slim down a number of tree nodes

[Nathan Froyd]

On Fri, Mar 11, 2011 at 12:18:15AM -0800, Mike Stump wrote:
> On Mar 10, 2011, at 8:23 PM, Nathan Froyd <froydnj@codesourcery.com> wrote:
> > This patch series does something similar to what
> 
> I am curious what the speed differences are.

A non-rigorous, C-only, release-checking bootstrap (which showed me that
I forgot to change the release-checking TREE_TYPE macro, oops!) make -j4
on a lightly-loaded-ish quad-core machine gave these numbers:

without patch
real    10m8.397s
user    33m18.060s
sys     2m43.300s

with patch
real 9m57.203s
user 33m12.660s
sys  2m44.090s

So noise-ish territory.  I suppose a more fair comparison would be just
the gcc/ directory, and those non-rigorous numbers, from a 'cd gcc &&
make && time make -j4' post-bootstrap are:

without patch gcc/
real    2m41.307s
user    8m0.180s
sys     0m30.950s

with patch gcc/
real 2m35.716s
user 7m55.050s
sys  0m30.160s

Of course, these numbers were only measured once, so they are
non-definitive, etc. etc.

-Nathan