Hi,

Given a command line based C++ application written in pure C++ and using the Standard C and C++ libraries (thus being portable across OSes).

How would one compare the execution of performance of such an application across the following OSes ?

Windows , Solaris, Linux, AIX

For a given application which contains absolutely no OS specific calls (like the above), would there be a difference in execution performance across operating systems ?

What are the parameters that one needs to consider which contributing to difference in performance across OSes - the source code being absolutely the same ?