nanogui: nano-X speed
Subject:
Re: [nanogui] nano-X speed
From:
"Greg Haerr" ####@####.####
Date:
19 Feb 2002 00:42:04 -0000
Message-Id: <03b601c1b8dc$4074d900$3aba46a6@xmission.com>
: I'm using nano-X under X and I find it quite slow. For example a
: GrMoveWindow for a 600x400 window - with no other overlapping window - takes
: about 2sec.
:
: Does it sounds normal, or is it because of the X backend ? Should I expect
: better performance on a framebuffer ?
The primary reason for the speed problem is the result of the Microwindows
X11 blit implementation. It currently reads the pixels one at a time
and copies them into a PSD struct, only to be copied back out. What
is needed is an X11 screen-to-screen blit that doesn't copy in the
screen driver. The reason this ended up this way is a bit complicated,
but should probably be redone.
Another quick fix would be to comment out the "quick" window-move
code in nanox/srvfunc.c::GrMoveWindow, and have the windows
redraw themselves... This will work faster on X11, but is worth it.
Regards,
Greg
