On 5/23/19 9:29 AM, Richard Biener wrote:
On Thu, May 23, 2019 at 3:29 AM Andrew MacLeod <amacl...@redhat.com> wrote:
All times are with a release configured compiler. Out of the 242 files,
pretty much across the board in all 4 sets of figures, RVRP was faster
in about 90% of the cases, and slower in the other 10%, resulting in the
following cumulative totals.
Overall (242 files)
1 - Raw RVRP 22% slower (**a**)
2 - No edge calculation(1) 4.5% slower
3 - No switch processing(2) 9.5% faster
4 - No dominators(3) 16% faster (**b**)
5 - Conditionals (including switches) only 4% faster
I don't understand a vs. b here. Does this mean dominators
cost 38% performance?!
Does 4 imply 3 and 2 maybe?
Dominators cannot be this expensive.
hope
I believe 4 also has no switch processing, so yes, it implies 3 which
also includes 2. so we go from 10% faster to 16% faster without
building the dominators. Probably more the kind of number you were
expecting :-)
Andrew
