¿Cómo optimizar la base de datos sqlite3 de Android?

#!/system/bin/sh

## Author : Seff P.
## Version: 20171129
## Run as ROOT (su) user

# Download the sqlite3 binary for your CPU arch and place at /system/xbin/sqlite3 (Set exec. perm.)
SQLITE3=/system/xbin/sqlite3

RES_PATH="/sdcard"
echo -n "Database last optimized: "
cat $RES_PATH/last_db_optimized_date 2> /dev/null || echo UNKNOWN

echo
PRESIZE=0
POSTSIZE=0

# Turn-off Wifi and Mobile Data to reduce DB operations during optimization
svc data disable 
svc wifi disable

# Database optimize
for DB in \
`busybox find /data/data/*/databases -type f ! -name "*-*"`;
do \
  CURSIZE=$(du $DB | awk {'print $1'})
  PRESIZE=$(( $PRESIZE + $CURSIZE ))
  echo -ne "\e[39m$DB" | sed 's/\/data\/data\///g' | sed 's/\/databases\//\//g'
  $SQLITE3 $DB 'REINDEX;' &> /dev/null && $SQLITE3 $DB 'VACUUM;' && echo -e "\e[32m [DONE]" || echo -e "\e[31m [FAIL]"
  CURSIZE=$(du $DB | awk {'print $1'})
  POSTSIZE=$(( $POSTSIZE + $CURSIZE ))
done;
echo -e "\e[39m"

date > $RES_PATH/last_db_optimized_date
echo "Total DB size before: $PRESIZE KB"
echo "Total DB size after : $POSTSIZE KB"