OK, to reproduce, run something like: for i in `yes | head -n 40` ; do (gwenview /usr/share/evolution/2.26/images/world_map-960.png &) ;done
Then I get ~10 seconds for 10 alt-tabs. Typing killall gwenview makes the problem go away again.
OK, to reproduce, run something like: evolution/ 2.26/images/ world_map- 960.png &) ;done
for i in `yes | head -n 40` ; do (gwenview /usr/share/
Then I get ~10 seconds for 10 alt-tabs. Typing
killall gwenview
makes the problem go away again.