https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80290
Richard Biener <rguenth at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Priority|P3 |P1
Status|UNCONFIRMED |NEW
Keywords| |memory-hog
Last reconfirmed| |2017-04-04
Component|c++ |libstdc++
Ever confirmed|0 |1
Summary|g++ uses unreasonable |[6/7 Regression] g++ uses
|amount of memory compiling |unreasonable amount of
|nested string maps |memory compiling nested
| |string maps
Target Milestone|--- |6.4
--- Comment #1 from Richard Biener <rguenth at gcc dot gnu.org> ---
Confirmed. The initializer is not unreasonably large IMHO but is certainly the
problem.
clang++ uses 500MB for me when not optimizing, g++ 4.8 and g++ 5 around 200MB.
Starting with g++ 6 we use gigabytes.
Seems to be caused by libstdc++ changes given g++ 7 preprocessed source uses
as much memory with g++ 5 as with 7 (even worse, at 12GB and still
compiling...)
