How to reduce the "connecting" time

I’m using docker-jitsi-meet.
There is a long “connecting” time before the call begins. (Approximately 5-10 seconds)

I checked the log and packet capture.
It takes time for the following two points.
Please tell me how to save time.

1.★★★ part of the jicofo log

Sep 22, 2021 1:28:28 AM org.jitsi.utils.logging2.LoggerImpl log
INFO: Focus request for room: xxxxxxx.meet.jitsi
Sep 22, 2021 1:28:28 AM org.jitsi.utils.logging2.LoggerImpl log
INFO: Created new conference, roomJid=xxxxxxx.meet.jitsi
Sep 22, 2021 1:28:28 AM org.jitsi.utils.logging2.LoggerImpl log
INFO: Joining xxxxxxx.meet.jitsi
Sep 22, 2021 1:28:28 AM org.jitsi.utils.logging2.LoggerImpl log
INFO: Chat room event Joined member=ChatMember[xxxxxxx.meet.jitsi/xxxxxxxx, jid: null]@999999999
Sep 22, 2021 1:28:28 AM org.jitsi.utils.logging2.LoggerImpl log
WARNING: Focus role unknown
Sep 22, 2021 1:28:28 AM org.jitsi.utils.logging2.LoggerImpl log
INFO: Obtained focus role: OWNER
Sep 22, 2021 1:28:28 AM org.jitsi.utils.logging2.LoggerImpl log
INFO: Granted owner to xxxxxxxx
Sep 22, 2021 1:28:28 AM org.jitsi.utils.logging2.LoggerImpl log
INFO: Member joined:xxxxxxxx
Sep 22, 2021 1:28:28 AM org.jitsi.utils.logging2.LoggerImpl log
INFO: Chat room event PresenceUpdated member=ChatMember[xxxxxxx.meet.jitsi/xxxxxxxx, jid: xxxxxxxxxxx@meet.jitsi/xxxxxx]@999999999
Sep 22, 2021 1:28:28 AM org.jitsi.utils.logging2.LoggerImpl log
INFO: Chat room event PresenceUpdated member=ChatMember[xxxxxxx.meet.jitsi/xxxxxxxx, jid: xxxxxxxxxxx@meet.jitsi/xxxxxx]@999999999
★★★
Sep 22, 2021 1:28:30 AM org.jitsi.utils.logging2.LoggerImpl log
INFO: Focus request for room: xxxxxxx.meet.jitsi
Sep 22, 2021 1:28:30 AM org.jitsi.utils.logging2.LoggerImpl log
INFO: Chat room event Joined member=ChatMember[xxxxxxx.meet.jitsi/xxxxxxxx, jid: null]@999999999
Sep 22, 2021 1:28:30 AM org.jitsi.utils.logging2.LoggerImpl log
INFO: Member joined:xxxxxxxx

2.From the time the callee picks up the call to the start of jicofo processing