Help to make faster my VI

Question

Hello!
I have a cluster array with 105500 clusters; in a cluster there are 3 2D array with the same size (10 rows and 8 columns).
I want to merge the data to obtain a single 2D array with 10*105500 rows and 8*3 columns.
I  know that with large array we have to initialize an array (in this situation with 10*105500rows and 8*3 columns ) and use Replace Array Subset; so i have used this procedure but  the time needed is to much..
What is the error in my VI?
Solved!
Go to Solution.
Attachments:
PostProcessing.vi ‏21 KB

Answer 1

Ok, I haven't looked at your VI in detail but here is some advice:
1) Don't use property nodes for reading/writing data in your for loop. You should process the data and store it in shift registers and then finally display it rather than doing the read/replace/write using Value property nodes.
2) The build array function causes memory allocations which will take CPU time. If you can pre-calculate the size of your array then you can initialize array of the required dimensions to allocate the memory for the array once and then use replace array subset to put the items into the right place in the array. If you go to Tools -> Performance -> Show buffer allocations, this will help to show you (with some caveats) where LabVIEW is having to allocate memory in your VI.
3) The 'index array' functions in your 2nd for loop are probably unnecessary - use auto-indexing tunnels instead if you can
These points are the ones that immediately stand out as being what is causing poor performance of your VI without trying to get really clever about the array manipulation and optimisation of the VI (like using in-place element structures).
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