Tobias Burnus wrote:
no stack-arrays with stack-arrays
+ -fwhole-program -flto: 10.1s 8.9s
+ -fwhole-program -flto -finline-limit=600 4.8s 3.6s
I wonder whether the following is special to my system* or generally
true. I use:
gfortran -O3 -march=native -ffast-math -funroll-loops -fwhole-program
-finline-limit=600 fatigue.f90
no stack-arrays with stack-arrays
0m6.622s 0m8.174s
-flto 0m8.444s 0m8.174s
Thus, the non "-flto" version is faster (in particular without stack
arrays). I assume that it has to do with the declaration issues of the
front end. However, the last time I tried to find the problem, I failed
to spot anything which looked wrong - especially, the UIDs seemed to be
OK. (Besides, I would like to have the -fno-lto performance also with
.-flto ... ;-)
Tobias
* AMD Athlon(tm) 64 X2 Dual Core Processor 4800+ (2.4 GHz), x86-64 Linux
