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chris
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Joined: 24/08/2020
Location: United Kingdom
Posts: 56

Posted: 08:47pm 14 Oct 2020

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Somebody recently pointed me in the direction of this benchmark:

http://oldcomputer.info/8bit/benchmarks/index.htm

I'm away from computer so haven't had time to try it out, but I wonder how CMM1 and CMM2 would do?

CircuitGizmos

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Joined: 08/09/2011
Location: United States
Posts: 1427

Posted: 08:59pm 14 Oct 2020

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Quote S=0

TIMER=0

FOR N=1 TO 100
�A=N
�FOR I=1 TO 10
� �A=SQR(A)
�NEXT I
�FOR I=1 TO 10
� �A=A*A
�NEXT I
�S=S+A
NEXT N
PRINT ABS(1010-S/5)

PRINT TIMER

CMM2: 0.014 seconds.
Edited 2020-10-15 06:59 by CircuitGizmos

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vegipete

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Joined: 29/01/2013
Location: Canada
Posts: 1132

Posted: 09:09pm 14 Oct 2020

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For the first example, I get 15.9 seconds .... for 1000 iterations. Drastically faster than anything in the table. The print statement from line 120 doesn't slow it much - 15.7 seconds with no print. Allowing the print to scroll does slow it a little bit. (400 MHz Waveshare.)

time: 15908.843

> list
t = timer

for many = 1 to 1000
10 S=0
20 FOR N=1 TO 100
30 A=N
40 FOR I=1 TO 10
50 A=SQR(A)
60 NEXT I
70 FOR I=1 TO 10
80 A=A*A
90 NEXT I
100 S=S+A
110 NEXT N
120 PRINT @(100,200) ABS(1010-S/5)
next many
? "time:" timer - t

130 END

Edited 2020-10-15 07:10 by vegipete

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SimpleSafeName

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Joined: 28/07/2019
Location: United States
Posts: 351

Posted: 03:15am 15 Oct 2020

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Okay, let's see...

I have TI99/4As,
a ZX Spectrum +2, a +3, and a Harlequin ZX,
Commodore 64s, 128s, and VIC20s,
Mattel Aquariuses (happy to see this oft-maligned computer do so well),
an Acorn Electron and a BBC Micro B.

But where are the MSX computers? I may have to bust out my MSX TurboR and see what it will do. :)

Tinine
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Joined: 30/03/2016
Location: United Kingdom
Posts: 1646

Posted: 06:39am 15 Oct 2020

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118ms on my E-100 @100MHz

So in this case, the 400MHz CMM2 is ~7.5X the speed of the PIC32MX470

PeteCotton

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Joined: 13/08/2020
Location: Canada
Posts: 543

Posted: 06:05pm 15 Oct 2020

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Just for giggles, I thought I would run it in C# (on a Ryzen 7 2700 desktop).

The print/scrolling command really slows it down. 650 milliseconds for 1,000 iterations as opposed to 16 milliseconds when updating a label without scrolling.

Note: This is just for curiosity. Of course it's an unfair comparison to throw a modern computer against 40 year old tech... and I know C# vs Basic isn't fair either... and I'm only using one of the 16 threads... but all in all 375,000 times faster than a BBC Micro. It boggles the mind how far we have come.

vegipete

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Posts: 1132

Posted: 07:21pm 15 Oct 2020

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Speed, or lack thereof. 4 minutes and 10 seconds.
Perhaps of greater concern is the completely different answer than the CMM2.

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twofingers

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Joined: 02/06/2014
Location: Germany
Posts: 1593

Posted: 08:35pm 15 Oct 2020

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My first "laptop" (Tandy 100)! I loved it!

Michael

causality ≠ correlation ≠ coincidence

Volhout
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Joined: 05/03/2018
Location: Netherlands
Posts: 5089

Posted: 05:16pm 16 Oct 2020

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Epson PX8

Don't have it anymore.. awfully slow with it's Z80 running at 780kHz...(CMOS).

PicomiteVGA PETSCII ROBOTS

mclout999
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Joined: 05/07/2020
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Posted: 06:30pm 16 Oct 2020

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twofingers said

My first "laptop" (Tandy 100)! �I loved it!

Michael

I still have mine!! It's keyboard has a cold solder joint somewhere. I have to take the time to fix it but it works great except for the column of keys that do not work.

SimpleSafeName

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Posted: 08:33pm 16 Oct 2020

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mclout999 said

twofingers said

My first "laptop" (Tandy 100)! �I loved it!

Michael

I still have mine!! �It's keyboard has a cold solder joint somewhere. I have to take the time to fix it but it works great except for the column of keys that do not work.

I think that it was either Jan Beta, Adrian's Digital Basement, or Retro Recipes that had a Tandy with the exact same problem. It might have been a TRS 80 though. But "SepTandy" is the month where many of the retro guys dig up their Tandys and spruce them up.

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