[Bug lto/82229] GCC7's LTO underperforms compared to GCC6

[krzysio.kurek at wp dot pl]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82229

--- Comment #5 from krzysio.kurek at wp dot pl ---
Created attachment 42199
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=42199&action=edit
callgrind output

I can make the program output to console average fps after 20 iterations with
10 warmup cycles. The program will still run with GUI, but will output just FPS
to the console and exit. Will this be sufficient?
I'm a complete newbie to the whole language, but I got some profiling done. I'm
attaching callgrind output files, they're named after which compiler was used.