docs: def load_module(self, filename):
          '''Load a benchmark module from file'''
          if not isinstance(filename, string_types):
              return filename
          basename = os.path.splitext(os.path.basename(filename))[0]
          basename = basename.replace('.bench', '')
          modulename = 'benchmarks.{0}'.format(basename)
          return load_module(modulename, filename)