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Top Forums UNIX for Advanced & Expert Users Performance impact of terminal output Post 302619389 by Corona688 on Thursday 5th of April 2012 11:05:19 AM
Old 04-05-2012
There is some overhead to displaying the terminal contents, yes. How much overhead, depends on the kind of terminal.

local rawtext console -- Blazing fast. Not much to be gained.
xterm/etc -- medium. You may notice some improvements from redirecting the output.
Framebuffer console -- Dog-slow. Every newline is a huge video block-copy operation. They're almost slow enough to watch. You may get startling improvements from reducing output.
 

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PLOT(3X)																  PLOT(3X)

NAME
plot: openpl et al. - graphics interface SYNOPSIS
openpl( ) erase( ) label(s) char s[ ]; line(x1, y1, x2, y2) circle(x, y, r) arc(x, y, x0, y0, x1, y1) move(x, y) cont(x, y) point(x, y) linemod(s) char s[ ]; space(x0, y0, x1, y1) closepl( ) DESCRIPTION
These subroutines generate graphic output in a relatively device-independent manner. See plot(5) for a description of their effect. Openpl must be used before any of the others to open the device for writing. Closepl flushes the output. String arguments to label and linemod are null-terminated, and do not contain newlines. Various flavors of these functions exist for different output devices. They are obtained by the following ld(1) options: -lplot device-independent graphics stream on standard output for plot(1) filters -l300 GSI 300 terminal -l300s GSI 300S terminal -l450 DASI 450 terminal -l4014 Tektronix 4014 terminal SEE ALSO
plot(5), plot(1), graph(1) PLOT(3X)
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