Abstract
The Common Object Request Broker Architecture (CORBA) is intended to simplify the task of developing distributed ap- plications. Although it is well-suited for conventional RPC- style applications, several limitations become evident when CORBA is used for a broader range of performance-sensitive applications running in heterogeneous environments over high-speed networks. This paper illustrates the performance limitations of existing CORBA implementations in terms of their support for the dynamic invocation interface and the dynamic skeleton interface. The results described below in- dicate that ORB implementors must optimize both the DII and DSI significantly before CORBA will be suitable for performance-sensitive applications on high-speed networks. In addition, the CORBA 2.0 DII specification must be clar- ified in order to ensure application portability and optimal performance.

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