I can't find any Dhrystone MIPS figures for the Apple IIgs, be it the stock 2.8 MHZ WDC 65C816 variant, or any of the overclocked or accelerator card packing variants. Has anyone tried the benchmark on a stock Apple IIgs, or know of a source, if so what were the numbers?
1 Answer
You can find lots of discussion about dhrystone numbers and accelerators on old comp.sys.apple2 and comp.sys.apple2.gno usenet posts. Here are some numbers from the accelerator FAQ:
BenchMark v5.0 results:
CPU Stock TWGS TWGS TWGS ZipGS ZipGS ZipGS
Version ROM 01 1.8s 1.8s 1.8s 1.0.2 1.0.2 1.0.2
Cache/Spd 32k/15 32k/15 32k/15 64k/?? 64k/?? 64k/??
Clock Spd 2.8 15 13.75 12.5 16 15 14
======= ====== ====== ====== ====== ====== ======
Sieve 410.00 99.00 108.00 117.00 98.00 99.00 110.00
String 1151.20 270.00 292.00 303.67 259.00 262.00 282.00
Float 1 472.00 92.33 87.00 111.33 123.00 128.00 135.00
Float 2 1535.00 317.00 394.00 381.67 395.00 415.00 432.00
Fibinacci 2006.00 605.00 634.00 645.33 507.00 523.00 548.00
Integer 1553.40 307.00 330.00 346.67 420.00 431.00 443.00
Dhrystone 236 1136 1063 1000 NA NA NA
* 1351 1183 1282 NA NA
* Dhrystone v1.1 re-compiled under ORCA/C v2.0.1
System Software 5.0 QuickDraw II improvement test:
Stock //gs: 5648 ticks
TWGS 15 MHz: 1332 ticks (over 4x faster than stock)
If you look at the numbers, a 12 MHz or faster TWGS/Zip will make everything
just about 4x faster than a stock //gs.
Other self reported numbers are fairly consistent, somewhere around 70-90 dhrystones per mhz. Keep in mind it's just as much a compiler benchmark as a CPU benchmark. People often didn't report (or know) which compiler was involved. Dhrystone compiled with ORCA/C 2.0 was 20% faster than with ORCA/C 1.x.
