CMM Automation Speed C# versus VB6

Hi,

I am currently converting an application that automated PC-DMIS in VB6 over to C#. Our application does the following:

1) Ask the user what PC-DMIS program (i.e. a PRG file) they want to run
2) Launch PC-DMIS passing in the name of the program file selected
3) Get PC-DMIS to run a series of measurements on a Scirocco machine
4) Import the measurements from PC-DMIS into the application for processing
5) Process the results (basically we compare the measurements to a baseline, then insert the deviation into a database)

What I observed is that for any program (we've tried quite a few and this seems to be consistently happening), the VB6 application takes approximately 30 seconds to perform step 4, whereas the C# application takes around 2.5 minutes.

Can anyone help with the following questions please?

1) We directly ported the code from the legacy VB6 application to C# so the new program isn't doing anything different from what the old VB6 one used to do, so why does C# take so much longer than VB6 to perform the import?
2) Is there any way to speed it up, e.g. I think I read something on a forum that VB.NET may be faster, but I can't find anything technical from Microsoft to support that so I can't really justify burning a lot of hours to convert from C# to VB.NET in case it is the same speed?

Thanks!

Parents

AndersI over 10 years ago
I read up on MSDN's definition of the for loop (here: http://msdn.microsoft.com/en-us/library/ch45axte.aspx), and supposedly the loop initialization is only evaluated once. If that were true, there would be no performance difference between the following loops:

//Test loop 1 for (int i = 1; i < pcd.Commands.Count; i++) { } //Test loop 2 int cmdCnt = pcd.Commands.Count; for (int i = 1; i < cmdCnt; i++) { }

Yes, there would - the initialization part is only int i = 1;, the test part must be done on each turn through the loop.
Cancel
Vote Up 0 Vote Down

Sign in to reply

Cancel

Reply

AndersI over 10 years ago
I read up on MSDN's definition of the for loop (here: http://msdn.microsoft.com/en-us/library/ch45axte.aspx), and supposedly the loop initialization is only evaluated once. If that were true, there would be no performance difference between the following loops:

//Test loop 1 for (int i = 1; i < pcd.Commands.Count; i++) { } //Test loop 2 int cmdCnt = pcd.Commands.Count; for (int i = 1; i < cmdCnt; i++) { }

Yes, there would - the initialization part is only int i = 1;, the test part must be done on each turn through the loop.
Cancel
Vote Up 0 Vote Down

Sign in to reply

Cancel

Children

No Data