Performance problem (components overhead)

[petersJazz]

I have a performance problem when running an VB6 application with 3 components. If I make an installation with the components installation guide and run it. Then the speed of the software is many times lower than if I start one special components and run it in VB. If I start and run the components in VB that I mostly uses in the process I get the same slow result. But if I start another component in VB then the speed will increase about 10 to 20 times. One reason that I can think of is some kind of overhead in the MTS for the components, but that is my guess.

 

[mikewoodhouse]

MTS certainly adds an overhead, mostly when your MTS machine is remote: you're basically doing DCOM and you're potentially sharing the server with any number of other users.

DCOM communicates at network speeds, out-of-process COM is faster, in-process fastest. One way to improve DCOM performance is to reduce the number of round trips. So if you have five properties to set, write a Sub that takes all five property values and call that instead, reducing the number of (slow) trips by 5.