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

["mikpe at it dot uu dot se" <gcc-bugzilla@gcc.gnu.org>]

------- Comment #5 from mikpe at it dot uu dot se  2010-08-21 15:44 -------
(In reply to comment #4)
> 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:

Same machine, but running a 64-bit kernel and using a 64-bit gcc-4.5.1:

> time gcc -m32 -O0 -c pr45364.i
1.390u 0.090s 0:01.49 99.3%     0+0k 0+0io 0pf+0w
> time gcc -m32 -O0 -g -c pr45364.i
1.630u 0.060s 0:01.71 98.8%     0+0k 0+0io 0pf+0w
> time gcc -m32 -O1 -c pr45364.i
3.690u 0.090s 0:03.80 99.4%     0+0k 0+0io 0pf+0w
> time gcc -m32 -O1 -g -c pr45364.i
26.740u 0.230s 0:27.00 99.8%    0+0k 0+0io 0pf+0w
> time gcc -m32 -O2 -c pr45364.i
10.960u 0.220s 0:11.52 97.0%    0+0k 0+0io 0pf+0w
> time gcc -m32 -O2 -g -c pr45364.i
291.430u 0.540s 4:52.15 99.9%   0+0k 0+0io 0pf+0w

In the last -O2 -g run cc1 used about 344MB of address space.

So it doesn't take forever but -g is definitely a CPU hog.


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