os.execv Overhead

[mark.mcdow...@gmail.com]

I have a script that automates running a program X times by preparing
the required files and passing the external program right variables.

What I am unsure about though is the overhead of:

        program  = "externalScript"
        variables = ["-i", "var1"]
        pid = os.fork()
        if not pid:
                os.execv(program, [program] + variables)
        os.wait()

Whether there would be a more efficient way of making such a call.

Any comments would be greatfully appreciated.
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