
It took quite a while but here is the output of the build

pi@raspberrypi ~/src/mineserver/bin $ ./mineserver
Parser opening file /home/pi/src/mineserver/bin/config.cfg
Parser opening file /home/pi/src/mineserver/bin/item_alias.cfg
mineserver.cpp:251::Mineserver(): Using config: /home/pi/src/mineserver/bin/config.cfg
[11:52:30] mineserver.cpp:289::Mineserver(): Welcome to Mineserver v0.1.18 (Alpha)
[11:52:30] mineserver.cpp:290::Mineserver(): Using zlib 1.2.7 libevent 2.0.19-stable
[11:52:30] mineserver.cpp:292::Mineserver(): Generating RSA key pair for protocol encryption
[11:52:31] mineserver.cpp:300::Mineserver(): RSA key pair generated.
[11:52:31] mineserver.cpp:333::Mineserver(): ServerID: 93cfbe92c73bbbeb
[11:52:31] Plugin: Loading: plugins/commands.so
[11:52:31] plugin.commands: Loaded commands!
[11:52:31] Plugin: Loading: plugins/filelog.so
[11:52:31] plugin.filelog: Loaded Filelog
[11:52:31] plugin.filelog: Logging to mineserver.log
[11:52:31] plugin.filelog: Logging chat to mineserver_chat.log
[11:52:31] Plugin: Loading: plugins/flatpermissions.so
[11:52:31] plugin.flatpermissions: Loaded flatpermissions!
[11:52:31] Plugin: Loading: plugins/nBreak.so
[11:52:31] plugin.nBreak: Loaded nBreak!
[11:52:31] Plugin: Loading: plugins/nether.so
[11:52:31] plugin.nether: Loaded nether!
[11:52:31] Plugin: Loading: plugins/passiveMobs.so
[11:52:31] plugin.passiveMobs: Loaded passiveMobs!
[11:52:31] map.cpp:228::init(): Using world: A-world
[11:52:31] Map: Warning: Map directory not found, creating it now.
[11:52:31] Map: Warning: level.dat not found, creating it now.
[11:52:31] Map: No Trees in level.dat, creating..
[11:52:31] mineserver.cpp:514::run(): Generating spawn area...
[11:52:46] mineserver.cpp:549::run(): 11/121 done. 1305ms per chunk
[11:52:46] mineserver.cpp:549::run(): 22/121 done. 69ms per chunk
[11:52:47] mineserver.cpp:549::run(): 33/121 done. 66ms per chunk
[11:52:58] mineserver.cpp:549::run(): 44/121 done. 944ms per chunk
[11:53:00] mineserver.cpp:549::run(): 55/121 done. 174ms per chunk
[11:53:00] mineserver.cpp:549::run(): 66/121 done. 63ms per chunk
[11:53:02] mineserver.cpp:549::run(): 77/121 done. 125ms per chunk
[11:53:03] mineserver.cpp:549::run(): 88/121 done. 90ms per chunk
[11:53:04] mineserver.cpp:549::run(): 99/121 done. 129ms per chunk
[11:53:06] mineserver.cpp:549::run(): 110/121 done. 159ms per chunk
[11:53:12] mineserver.cpp:549::run(): 121/121 done. 519ms per chunk
[11:53:12] Map: Spawn area ready!
[11:53:12] mineserver.cpp:622::run(): Listening on:
[11:53:12] mineserver.cpp:633::run(): 127.0.1.1:25565
Connecting, breaking/placing blocks and chat all work fine. When generating new chunks it uses about 97% CPU and constantly stays at about 46% memory usage. If you stand in one place only 1.6% cpu usage. Meaning as long as chunks aren't being generated, its perfectly playable.
It might be possible to add a throttle to limit the chunk generation to a certain radius to remove the issue completely.
If you want to try install Mineserver your Raspberry Pi check out the article I've written.
https://mineserver.be/wiki/Raspberry_Pi