Path: utzoo!mnetor!uunet!husc6!ut-sally!utah-cs!shebs
From: shebs@utah-cs.UUCP (Stanley Shebs)
Newsgroups: comp.windows.x
Subject: Graphics Context in X11
Message-ID: <5163X@utah-cs.UUCP>
Date: 21 Jan 88 00:00:00 GMT
Organization: PASS Research Group
Lines: 16
Keywords: caching, cost

The X11 Xlib document warns against using too many graphics contexts and
switching between them, as opposed to re-setting the attributes of a few.
I would like to know:

1. Does anybody actually cache GC data in the hardware, and if so, what sorts
of data and how much is typically cached?

2. What is the range in performance variation between using, say, 30 GCs whose
attributes are never changed, vs one GC with an average of two attribute
settings per graphics call?  I'm especially interested in differences between
one server and another.

Any info will be greatly appreciated.

							stan shebs
							shebs@cs.utah.edu