MIUI 8 China Developer ROM 6.6.23 changelog preview suggest this update boost up booting time and reduce the boot time to half.
After flashing MIUI 8 first time boot takes huge time. In this update, the first time boot up time reduces to half.
Xiaomi also fixes some minor issue on Second Space and Cloned apps. In this new version, most of the app can be cloned.
Except reducing booting time there is no major update introduced in MIUI 8 China Developer ROM 6.6.23.
The full changelog along with download link will be posted on Friday, so stay tuned!