I've compiled the DOS version of POV-Ray 3.1e with djgcc 2.8.1 and have
optimised it to the point where it runs at the same speed as the official
Watcom compile.

The CFLAGS I used were:
# For gcc 2.81
CFLAGS=-O3 -s -mcpu=pentiumpro -march=pentiumpro \
 -malign-double -malign-loops=2 -malign-jumps=2 -malign-functions=2 \
 -fomit-frame-pointer -fno-exceptions -fforce-addr -fforce-mem \
 -funroll-loops -ffast-math

This renders skyvase.pov at 640 x 480 in 1 min 11 secs on my Celeron 333a.
The Watcom version does it in 1 min 12 secs!

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