https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101164
Bug ID: 101164
Summary: slow compilation for huge classes (>200k member
variables)
Product: gcc
Version: 6.3.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
Assignee: unassigned at gcc dot gnu.org
Reporter: rbuergel at web dot de
Target Milestone: ---
Created attachment 51049
--> https://gcc.gnu.org/bugzilla/attachment.cgi?id=51049&action=edit
clean example
similar to bug #101163, this also happens for member variables.
What puzzles me here: using gcc instead of g++ works perfectly fine
g++-4.9 slow-member-var.c -ftime-report
Execution times (seconds)
phase setup : 0.00 ( 0%) usr 0.00 ( 0%) sys 0.00 ( 0%) wall
1445 kB ( 7%) ggc
phase parsing : 7.96 (100%) usr 0.16 (100%) sys 8.14 (100%)
wall 18470 kB (92%) ggc
phase finalize : 0.00 ( 0%) usr 0.00 ( 0%) sys 0.01 ( 0%) wall
0 kB ( 0%) ggc
|name lookup : 7.74 (97%) usr 0.07 (44%) sys 7.82 (96%) wall
2073 kB (10%) ggc
preprocessing : 0.00 ( 0%) usr 0.06 (38%) sys 0.07 ( 1%) wall
5046 kB (25%) ggc
parser (global) : 0.02 ( 0%) usr 0.02 (12%) sys 0.03 ( 0%) wall
3886 kB (19%) ggc
parser struct body : 7.94 (100%) usr 0.08 (50%) sys 8.04 (99%) wall
9536 kB (48%) ggc
TOTAL : 7.96 0.16 8.15
19975 kB
gcc-4.9 slow-member-var.c -ftime-report
Execution times (seconds)
phase setup : 0.00 ( 0%) usr 0.00 ( 0%) sys 0.00 ( 0%) wall
1124 kB ( 9%) ggc
phase parsing : 0.12 (100%) usr 0.10 (100%) sys 0.22 (100%)
wall 10866 kB (90%) ggc
preprocessing : 0.04 (33%) usr 0.03 (30%) sys 0.07 (32%) wall
4811 kB (40%) ggc
lexical analysis : 0.05 (42%) usr 0.02 (20%) sys 0.08 (36%) wall
0 kB ( 0%) ggc
parser struct body : 0.03 (25%) usr 0.05 (50%) sys 0.07 (32%) wall
5951 kB (49%) ggc
TOTAL : 0.12 0.10 0.22
12045 kB
