[Qt-interest] Which one is faster?

[donglongchao]

Hi,all

I am working on an app of muti-threads and I have a question about threads.I have two threads now,one is UI thread and the other one is a working thread.So now in my working thread,I want to ask the UI thread to update some widget.There are several way to do that.
(1) Emit a signal and connect it to the slot of the widget.(2)Use postEvent (3)Use sendEvent (4)Use a QTimer with start(0,TRUE) (5)Creat a single shot timer with static single Shot.
So I want to know which one is faster?Or there is a faster way I didn't mention above?Of course,we should test them under the same situation(the sender and the receiver live in different threads).
TIA for any suggestion.

Longchao
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