[Bug tree-optimization/44563] GCC uses a lot of RAM when compiling a large numbers of functions

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=44563

--- Comment #13 from Richard Biener <rguenth at gcc dot gnu.org> ---
GCC 5 needs 31s and a peak of 2GB at -O0:

 integrated RA           :   5.91 (19%) usr   0.69 (11%) sys   6.41 (17%) wall
1615872 kB (55%) ggc
 LRA non-specific        :   2.41 ( 8%) usr   0.31 ( 5%) sys   2.45 ( 7%) wall 
 10752 kB ( 0%) ggc
 TOTAL                 :  31.16             6.18            37.47           
2954430 kB

very similar to 4.9.

At -O2 we take ages during early inlining again (inline summary updating). 
Honza?