Controls[] Cluster Property slow to run

Question

Hi,
I would like to register controls inside clusters for mouse events.
Since there are a lot of controls to register, I want to do it programmatically and I created a VI that searches for control refereces inside cluster with recursion.
The problem is that this code is too slow.
I have a main-cluster that contains 8 sub-clusters; each of the sub-cluster contains some sub-cluster and some controls.
As you can see in the figure I attached, it takes about 3 seconds to do the job, so it's too slow to run every time I load a page in my subpanel.
What's wrong? Is there another way to accomplish the task?
I'm using Win 7 64-bit and LV2012 SP1 32-bit. In the past I used this VI but I didn't find this behaviour.
Thanks in advance for any suggestion,
Alberto
GetClusterControls.vi (front panel):
GetClusterControls.vi (block diagram):
GetControlsRef.vi:
Attachments:
GetClusterControls.vi ‏82 KB
GetControlsRef.vi ‏23 KB

Answer 1

I haven't looked closely at your code, but I suspect that the repeated resizing of arrays might be at play. I wouldn't expect it to have this effect with a relatively low number of elements, but I haven't analyzed it closely.
What I usually use for this type of stack based recursion is a queue. You add and remove elements from the queue until it's empty and you build a parallel array for the results. Haven't had performance problems with it.
Another option which might help you here is the Traverse for Reference VI. In later LV versions this should be under the scripting palette if you have scripting activated. If not, it should be in vi.lib\Utility. I think it traverses the entire VI, so you might need to filter out the results after it's done by checking the owner of each control to see which are in the cluster.
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