Path: utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!usc!ucsd!ucbvax!bloom-beacon!SABER.COM!jimf
From: jimf@SABER.COM
Newsgroups: comp.windows.x
Subject: Re: XPutImage() vs XDrawPoint() performance.
Message-ID: <9007101444.AA20119@lance>
Date: 10 Jul 90 14:44:56 GMT
Sender: daemon@athena.mit.edu (Mr Background)
Organization: The Internet
Lines: 14

|If I want to draw billions of points on an in-memory image (not displayed), 
|  which of these two calls would be faster?

XPutImage by orders of magnitude.  XDrawPoints has a lot more overhead
and can only handle about 16,000 points per call (used to be 32,000
but that changed in R3 -- both of these figures are for the sample
server).

I used to use XDrawPoints for sending images to a pixmap but its
performance was so abysmal that I gave up.

jim frost
saber software
jimf@saber.com