speed of VBA and Lisp

Discussion in 'AutoCAD' started by Josua101, Jul 22, 2004.

  1. Josua101

    Josua101 Guest

    I have read on autolisp help that activex is faster than lisp.

    But I have translated a lisp program to VB program and it seems that VB
    program is slower in execution.
    The algorithm is the same in both.
    I am now using VB 6.0 instead of VBA.
    Are they the same?
    Why is VB6 slower?

    Thanks
     
    Josua101, Jul 22, 2004
    #1
  2. Josua101

    Tim Arheit Guest

    No, they are not the same. VBA is interpreted at runtime and is
    generally slower than VB. However, since VBA runs inside of Autocad
    there is less overhead when communicating with Autocad (VB on the
    other hand has to deal with interprocess communication). So depending
    on what is being done, VBA may be faster for the given task.

    If you have a lot of intensive calculations and not a lot of
    interaction with autocad (ie. calls to any autocad object), then VB
    should be faster. If you have a lot of interaction with autocad then
    VBA will likely be faster. Generally I program in VBA but call an
    ActiveX DLL (written in VB and called from VBA) if I have something
    computationally extensive.

    -Tim
     
    Tim Arheit, Jul 23, 2004
    #2
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