https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114578
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Time variable usr sys wall
GGC
phase setup : 0.00 ( 0%) 0.03 ( 0%) 0.10 ( 0%)
1903k ( 0%)
phase parsing : 114.74 ( 95%) 45.79 (100%) 160.53 ( 95%)
6159M (100%)
phase lang. deferred : 0.07 ( 0%) 0.00 ( 0%) 0.07 ( 0%)
9312 ( 0%)
phase opt and generate : 6.36 ( 5%) 0.10 ( 0%) 6.46 ( 4%)
293k ( 0%)
phase finalize : 0.00 ( 0%) 0.06 ( 0%) 1.72 ( 1%)
0 ( 0%)
|name lookup : 0.00 ( 0%) 0.01 ( 0%) 0.00 ( 0%)
109k ( 0%)
garbage collection : 1.89 ( 2%) 0.00 ( 0%) 1.89 ( 1%)
0 ( 0%)
callgraph construction : 6.35 ( 5%) 0.09 ( 0%) 6.44 ( 4%)
13k ( 0%)
preprocessing : 30.74 ( 25%) 24.93 ( 54%) 55.53 ( 33%)
2047M ( 33%)
parser (global) : 81.10 ( 67%) 20.86 ( 45%) 102.10 ( 60%)
4111M ( 67%)
constant expression evaluation : 1.08 ( 1%) 0.00 ( 0%) 1.08 ( 1%)
304 ( 0%)
post expand cleanups : 0.00 ( 0%) 0.00 ( 0%) 0.01 ( 0%)
2728 ( 0%)
initialize rtl : 0.00 ( 0%) 0.00 ( 0%) 0.01 ( 0%)
9032 ( 0%)
rest of compilation : 0.01 ( 0%) 0.01 ( 0%) 0.00 ( 0%)
16k ( 0%)
TOTAL : 121.17 45.98 168.88
6161M
Extra diagnostic checks enabled; compiler may run slowly.
For x86_64-linux-gnu (but with checking enabled). Definitely a front-end issue.
Preprocessing takes 2G is even more shocking.
