rprintf(FINFO, "total size is %.0f speedup is %.2f\n",
(double)stats.total_size,
(double)stats.total_size / (total_written+total_read));
rprintf(FINFO, "total size is %.0f speedup is %.2f\n",
(double)stats.total_size,
(double)stats.total_size / (total_written+total_read));