undomanger performance
undomanger performance
- Subject: undomanger performance
- From: Georg Seifert <email@hidden>
- Date: Sat, 30 Apr 2016 21:39:07 +0200
Hi
My app deals with an object tree that can have millions of leaves. It is possible to run an operation on all of them. Each will register its own change with the undo manager. The hole operation might tale a few second (the last line in the trace below). But after my operation is finished, there is another operation triggered by the system that takes much longer than the original task and it blocks the UI. It is directly linked to the undo registration, if I disable it, this does not happen.
Running Time Self (ms) Symbol Name
26258.0ms 81.3% 0,0 _dispatch_mgr_thread 0x4ef18d
26258.0ms 81.3% 0,0 _dispatch_mgr_thread
26258.0ms 81.3% 0,0 _dispatch_mgr_invoke
26250.0ms 81.2% 0,0 _dispatch_mgr_queue_drain
26248.0ms 81.2% 48,0 _dispatch_queue_drain
26168.0ms 81.0% 1,0 _dispatch_client_callout
26141.0ms 80.9% 97,0 _dispatch_source_set_timer3
25561.0ms 79.1% 25561,0 _dispatch_timers_update
481.0ms 1.4% 8,0 _dispatch_resume_slow
2.0ms 0.0% 2,0 _dispatch_queue_wakeup
8.0ms 0.0% 0,0 free
6.0ms 0.0% 6,0 dispatch_release
6.0ms 0.0% 6,0 _os_object_release
4.0ms 0.0% 4,0 dispatch_resume
1.0ms 0.0% 1,0 nano_free_definite_size
1.0ms 0.0% 0,0 <Unknown Address>
12.0ms 0.0% 12,0 OSAtomicEnqueue
9.0ms 0.0% 4,0 gcd_queue_item_complete_hook
6.0ms 0.0% 1,0 _dispatch_continuation_free_to_cache_limit
3.0ms 0.0% 2,0 _dispatch_introspection_queue_item_dequeue_hook
1.0ms 0.0% 1,0 DYLD-STUB$$free
1.0ms 0.0% 0,0 <Unknown Address>
2.0ms 0.0% 2,0 _dispatch_introspection_callout_return
7.0ms 0.0% 6,0 _dispatch_cache_cleanup
1.0ms 0.0% 0,0 _dispatch_timers_run
4162.0ms 12.8% 0,0 Main Thread 0x4ef176
Does anyone has an idea what’s going on?
Thanks
Georg Seifert
Xcode 7.2 on MacOS 10.10.5, 27" Retina-iMac.
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