Relay-Version: version B 2.10 5/3/83; site utzoo.UUCP Posting-Version: version B 2.10.2 9/18/84; site ecsvax.UUCP Path: utzoo!watmath!clyde!bonnie!akgua!mcnc!ecsvax!mjg From: mjg@ecsvax.UUCP (Michael Gingell) Newsgroups: net.micro.amiga Subject: In the cause of Science ..... Message-ID: <663@ecsvax.UUCP> Date: Thu, 31-Oct-85 09:42:27 EST Article-I.D.: ecsvax.663 Posted: Thu Oct 31 09:42:27 1985 Date-Received: Sat, 2-Nov-85 06:07:59 EST Distribution: net Organization: North Carolina Educational Computing Service Lines: 39 How fast is the Amiga ?. In the cause of Science I tried the Dhrystone benchmark published recently in net.sources. Running in CLI mode only and compiling with the current release of the Lattice compiler (no Enums) I found it executed 50000 Drystone loops in 110 secs. Thats approximately 450 Dhrystones/sec. But what happens if you are running other processes simultaneously ?. I tried running it with one of the graphics demos and the speed dropped to half. So I thought if I run 3 graphics demos and the benchmark the speed should halve again - right ? - Wrong. It stayed about the same. What is happening ?. For comparison here are some results from selected machines in the table given in the last Drystone posting : From: rer@vaximile.UUCP (R.RICHARDSON) * * MACHINE MICROPROCESSOR OPERATING COMPILER DHRYSTONES/SEC. * TYPE SYSTEM NO REG REGS * -------------------------- ------------ ----------- --------------- * IBM PC/XT 8088-4.77Mhz PCDOS 2.1 Lattice 2.15 403 - @ * PDP-11/34 - UNIX V7M cc 387 438 * ATT PC6300 8086-8Mhz MSDOS 2.11 b16cc 2.0 632 684 * IBM PC/AT 80286-6Mhz PCDOS 3.0 CI-C86 2.1 666 684 * Macintosh 68000-7.8Mhz 2M Mac Rom Mac C 32 bit int 694 704 * Macintosh 68000-7.7Mhz - MegaMax C 2.0 661 709 * Macintosh 68000-7.8Mhz 2M Mac Rom Mac C 16 bit int 877 909 S * IBM PC/AT 80286-6Mhz PCDOS 3.0 MS 3.0(small) 1063 1086 * IBM PC/AT 80286-6Mhz PCDOS 3.1 Lattice 2.15 1250 - @ * VAX 11/785 - UNIX 5.2 cc 2083 2083 * VAX 8600 - VMS VAX-11 C 2.0 7142 7142 * Amdahl 580 - UTS 5.0 Rel 1.2 cc Ver. 1.5 23076 23076 ----------------------------------------------------------------------------- Mike Gingell ....decvax!mcnc!ecsvax!mjg