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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

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Mike Gingell    ....decvax!mcnc!ecsvax!mjg