LabView 8 processing speed.

[rvchamberlin]

I use LabView for intensive mathematical calculations, so that processing speed is an important consideration. I have just converted my programs from LabView 6.1 to 8.0 and find that they run at least a factor of 10 slower on the new version. Is there a more efficient way to compile the programs, or does the 8.0 version have so much more overhead that it will never match the speed of earlier versions?

Thanks. 

[ChrisJ]

Hi,

1) Have you tried forcing LabVIEW to compile?
How Can I Force a VI to Recompile?
http://digital.ni.com/public.nsf/websearch/C1C6FE6231966E278625661F0054A970?OpenDocument

2) After recompiling, is the VI saved in 8.0?

3) If neither of those things help, please post your code and your benchmark results so that other discussion forum members can see if they can reproduce the behavior.

Regards,

Chris J

[altenbach]

I have found that LabVIEW 8.0 is often faster on pure math. 🙂

(As ChrisJ already hinted, make sure to compile or save a freshly converted VI. If you just load an old VI in a new version, it will be significantly slower until it is saved in the new version.)

[rvchamberlin]

Thank you for your suggestions. I have forced LabVIEW 8 to compile the programs, and they run much faster than before. Indeed, they are at least as fast as the 6.1 version (an informal comparison gives an average of 6% increase in speed for the seven main programs that I run). Thanks again for your help.

Ralph Chamberlin