Thanks wmertens for your help originally I had: ``` database was writed in 1.3185472186693612 seconds. text was writed in 0.11124303232645616 seconds. ``` without `VACUUM` pragma: ``` database was writed in 0.5217875576733301 seconds. text was writed in 0.11288163432618603 seconds. ``` It is 6 times slower than classical filesystem write