There's something wrong with your setup. In the Doom benchmark page, there is an Amiga 1200 with 060@50MHz using AGA getting 24.6 fps and even a 1200 with 040@40MHz using AGA getting 13.4 fps. You should be at least 20fps. Here is my setup...
All 060 caches turned on and MAPROM off (for BlizKick) in accelerator menu (ESC)
AmigaOS 3.9 BB4
"BlizKick myROM QUIET" line in S:Startup-Sequence using my custom made 3.9 ROM
ThoR's MuLibs installed (http://aminet.net/util/libs/MMULib.lha)
"MuFastZero MOVESSP ON" line added to S:Startup-Sequence for above
CopyMem installed (http://aminet.net/util/boot/CopyMem.lha)
The most likely problems would be incorrectly installed 68040 and 68060 libraries and not turning on the caches. The 68040.library in Libs: should be tiny. Mine is 748 bytes. If yours is over 1k then that is your problem. Open a shell and type "CPU" . You should see "System: 68060 68882 (INST: Cache Burst) (DATA: Cache CopyBack)". If these are fine, then try removing programs from your WBStartup, S:User-Startup and S:Startup-Sequence that might be causing a slow down.
FaLLeNOnE was correct. The problem was with the DoomAttack executable. I downloaded the DoomAttack package from aminet and the 060 one is much better...
2134 gametics 3385 realtics
I have never been able to use MuFastZero on my 1260, says the zero page is already remapped.
I use WB 3.1 with ClassicWB ADV
I am using blizkick and I'll look into CopyMem.
Anyway I have created an icon/script to run the timedemo. I was getting tired of retyping...
thanks
_nate