On 03/17/2015 02:17 AM, Andreas Krebbel wrote:
Just to have some numbers I did run a -j1 GCC bootstrap twice with and without
the patch on x86_64.
Best results for both are:
clean: 21459s
patched: 21314s
There rather appears to be a trend towards reduced compile time perhaps due to
the reduced number of
INSNs to be processed in the RTL passes between the two ifcvt runs (loop
optimization, combine,
fwprop, dse,...)?!
I also tried to measure the testsuite runs but the results show a big variance.
So what I have right
now does not qualify as a benchmark.
And reality is it's getting harder and harder to benchmark this kind of
thing with turbo modes and such. A single run isn't sufficient unless
you've locked the box into a particular cpu frequency.
jeff
