https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80290
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Summary|[6/7 Regression] g++ uses |[6/7/8 Regression] g++ uses
|unreasonable amount of |unreasonable amount of
|memory compiling nested |memory compiling nested
|string maps |string maps
--- Comment #24 from Richard Biener <rguenth at gcc dot gnu.org> ---
While memory use improved the testcase in comment#10 still shows substantial
increase in memory and time for each added init element:
1.24user 0.04system 0:01.28elapsed 100%CPU (0avgtext+0avgdata
170772maxresident)k
1.49user 0.07system 0:01.56elapsed 99%CPU (0avgtext+0avgdata
206396maxresident)k
0inputs+0outputs (0major+50914minor)pagefaults 0swaps
1.70user 0.05system 0:01.76elapsed 100%CPU (0avgtext+0avgdata
233904maxresident)k
so we improved some constant factor but didn't really address the underlying
issue.
Numbers from before the patch (on a loaded system, sorry) were
3.87user 0.10system 0:04.33elapsed 91%CPU (0avgtext+0avgdata
235760maxresident)k
0inputs+0outputs (0major+54479minor)pagefaults 0swaps
5.23user 0.16system 0:06.06elapsed 88%CPU (0avgtext+0avgdata
283860maxresident)k
0inputs+0outputs (0major+64971minor)pagefaults 0swaps
6.17user 0.15system 0:06.90elapsed 91%CPU (0avgtext+0avgdata
323796maxresident)k
0inputs+0outputs (0major+74942minor)pagefaults 0swaps
