...........
I have noticed very slow opening of windows and, sometimes, an associated (temporary) Spinning Beach Ball as well.
On occasion, Horos was rendered "non-responsive" and I had to kill it.
When I see this, Console shows (two examples):
....
3/21/15 11:46:57.058 AM WindowServer[101]: disable_update_timeout: UI updates were forcibly disabled by application "Horos" for over 1.00 seconds. Server has re-enabled them.
3/21/15 11:46:57.197 AM WindowServer[101]: common_reenable_update: UI updates were finally reenabled by application "Horos" after 1.14 seconds (server forcibly re-enabled them after 1.00 seconds)
3/21/15 11:46:57.245 AM Horos[6850]: start loading multiple thread
3/21/15 11:46:58.559 AM WindowServer[101]: disable_update_timeout: UI updates were forcibly disabled by application "Horos" for over 1.00 seconds. Server has re-enabled them.
3/21/15 11:46:59.325 AM Horos[6850]: end loading
3/21/15 11:46:59.683 AM WindowServer[101]: common_reenable_update: UI updates were finally reenabled by application "Horos" after 2.13 seconds (server forcibly re-enabled them after 1.00 seconds)
..........
3/21/15 11:50:34.909 AM ReadKit[2842]: Sync timer fired
3/21/15 11:50:38.001 AM Horos[6850]: start loading multiple thread
3/21/15 11:50:39.074 AM WindowServer[101]: disable_update_timeout: UI updates were forcibly disabled by application "Horos" for over 1.00 seconds. Server has re-enabled them.
3/21/15 11:50:39.519 AM WindowServer[101]: common_reenable_update: UI updates were finally reenabled by application "Horos" after 1.45 seconds (server forcibly re-enabled them after 1.00 seconds)
3/21/15 11:50:41.664 AM Horos[6850]: end loading
.........
When the operation involved a drag between two panes in the 2-D Viewer Window, which was slow, I see the following:
3/21/15 11:58:20.354 AM Horos[6850]: prepareForDragOperation
3/21/15 11:58:21.484 AM WindowServer[101]: disable_update_timeout: UI updates were forcibly disabled by application "Horos" for over 1.00 seconds. Server has re-enabled them.
3/21/15 11:58:21.700 AM WindowServer[101]: common_reenable_update: UI updates were finally reenabled by application "Horos" after 1.22 seconds (server forcibly re-enabled them after 1.00 seconds)
3/21/15 11:58:21.703 AM Horos[6850]: start loading multiple thread
3/21/15 11:58:21.887 AM Horos[6850]: draggingEnded
3/21/15 11:58:25.122 AM Horos[6850]: end loading
....................
Do you see the same ?
Howard