im not getting tired of updating password for benefit of ph family despite of my busy scheduled. anyway ill answer your question. we change password in order for us to connect to server. the server itself change its password every 12 hours. heres the fact. shadowsocks servers have category. server that has long duration, most of it is slow in terms of connection. simply because it was already congested. some server update password weekly. lets considered it as medium speed servers. but those servers which change there password every 12 hours/ 6 hours or alike. those are fast servers because the change of password itself avoid congestion. hope this will answer your query.