FOSS gamedev and creative worlds

On my server, this takes a long time to connect (media).
He arrives in the middle and takes too long.
The first few times it did not take much. After the players built houses around the spawn and many players have died leaving bones. What can I do to fix it?

yes maybe

Hybrid Dog wrote:Do you use a 3d animals mod?

not
I use simple mobs (by pilzAdam) Desabled the mob rat and sand_monter