#1107693 GCC 15 much slower than 14 at compiling

Package:
src:gcc-15
Source:
src:gcc-15
Submitter:
Boris Kolpackov
Date:
2025-08-18 07:33:04 UTC
Severity:
normal
#1107693#5
Date:
2025-06-12 08:52:23 UTC
From:
To:
I noticed that GCC 15 is much slower at compiling C++. I tested this on a
smallish C++ codebase. It compiles with GCC 14 (Debian 14.2.0-1) in 14s.
The same plain build (no debug/optimization) takes 24s with GCC 15 (Debian
15.1.0-7).

I didn't hear any widespread outcry about such a slowdown so I am suspecting
this is something Debian-specific. Perhaps it's a checked build of GCC? If
so, maybe it makes sense to change that, seeing it's not a pre-release of
GCC?
#1107693#10
Date:
2025-06-12 09:25:57 UTC
From:
To:
Control: merge -1 1107329

see the merged bug report.
#1107693#17
Date:
2025-08-18 07:31:46 UTC
From:
To: