Here are some timing results for example 17 for various interactive devices.

softw...@raven> time ./x17c -dev xwin

real    0m10.224s
user    0m0.096s
sys     0m0.040s

softw...@raven> time ./x17c -dev qtwidget

real    0m11.521s
user    0m1.084s
sys     0m0.080s

softw...@raven> time ./x17c -dev wxwidgets

real    0m12.655s
user    0m0.944s
sys     0m0.160s

softw...@raven> time ./x17c -dev xcairo

real    1m19.804s
user    0m1.376s
sys     0m2.852s

So xcairo is roughly 7x slower than the others which is really noticeable
when running "make test_interactive" in either the build tree (with
BUILD_TEST=ON) or the installed examples tree.

Could one of those interested in the cairo device driver please put this
interactive speed issue on their ToDo list?

Alan
__________________________
Alan W. Irwin

Astronomical research affiliation with Department of Physics and Astronomy,
University of Victoria (astrowww.phys.uvic.ca).

Programming affiliations with the FreeEOS equation-of-state implementation
for stellar interiors (freeeos.sf.net); PLplot scientific plotting software
package (plplot.org); the libLASi project (unifont.org/lasi); the Loads of
Linux Links project (loll.sf.net); and the Linux Brochure Project
(lbproject.sf.net).
__________________________

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