'Runs once globally to print system information.'

@classmethod
def setUpClass(cls):

    global global_setup_ran
    if (not global_setup_ran):
        print '\nRunning    benchmark    with    {}    v{}    on    {}    ({})'.format(platform.python_implementation(), platform.python_version(), platform.platform(), Benchmark.getPlatformSpecificDetails())
        global_setup_ran = True
