Re: Facts (and a challenge)

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1 total messages Started by Denber.wbst Mon, 14 Oct 1985 18:22

#1235

Author: Denber.wbst
Date: Mon, 14 Oct 1985 18:22

43 lines
1803 bytes

	"Do the following tests on your favorite computer, and POST the
results. ... /* draw 8000 vectors of 200 pixels long with a skew. set by
offset */"

Well, here are some numbers from my favorite computer, a Xerox 1108
(Dandelion) running Interlisp-D (Intermezzo release) with the following
translation of the C code given:

(LAMBDA (OFFSET)
	(PROG ((X1 100)
		(Y1 100)
		(X2 100)
		(Y2 300))
		(add X1 (IMINUS OFFSET))
		(add X2 OFFSET)
		(for I to 20 
		   do (for J to 200 do (DRAWLINE X1 Y1 X2 Y2 1 (QUOTE REPLACE)
TWINDOW)
			   (add X1 1)
			   (add X2 1))
		        (for J to 200 do (DRAWLINE X1 Y1 X2 Y2 1 (QUOTE ERASE)
TWINDOW)
			   (add X1 -1)
			   (add X2 -1)))))

offset		pix/sec.

  0		45,198
  1		5000
  20		4863
  100		4336

I understand that the 1109 (Dandetiger) is supposed to draw lines an
order of magnitude faster than the 1108.

Disclaimer: The above does not reflect the opinions of my employer, or
maybe even me either.  In fact, it may only be a hallucination and have
no connection with any events in the real world at all.  Or maybe a
monkey escaped from the zoo, broke into my office, booted my machine,
and pounded it out on the keyboard.

			- Michel

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