[Bug middle-end/45364] Compiling wine's directx.c with -O1 -g takes a very long time

[mikpe at it dot uu dot se]

------- Comment #4 from mikpe at it dot uu dot se  2010-08-21 14:36 -------
Well something in -g processing is a CPU hog.  On my Turion X2 Ultra ZM-82
laptop (2.2GHz x 2 cores) with 32-bit kernel and vanilla gcc-4.5.1
(--enable-checking=release) I get:

> time gcc -m32 -O0  -c pr45364.i
1.220u 0.120s 0:01.35 99.2%     0+0k 0+0io 0pf+0w
> time gcc -m32 -O0 -g -c pr45364.i
1.500u 0.060s 0:01.57 99.3%     0+0k 0+0io 0pf+0w
> time gcc -m32 -O1 -c pr45364.i
3.100u 0.100s 0:03.21 99.6%     0+0k 0+0io 0pf+0w
> time gcc -m32 -O1 -g -c pr45364.i
22.590u 0.190s 0:22.81 99.8%    0+0k 0+0io 0pf+0w
> time gcc -m32 -O2 -c pr45364.i
8.680u 0.210s 0:08.93 99.5%     0+0k 0+0io 0pf+0w
> time gcc -m32 -O2 -g -c pr45364.i
238.490u 0.340s 3:58.97 99.9%   0+0k 0+0io 0pf+0w

During the last -O2 -g run I ran top and cc1 only used about 200MB, so swapping
is not the problem.


-- 


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=45364