High CPU Usage in 1.8 vs 1.7

Screen shot is linux "top" command. Both servers are with the same world, same everything actually, just in different folders, and using different minecraft_server jar files. Both servers have 0 players logged into them.

One is green is 1.7.10 minecraft_server file, the one in Orange is 1.8 pre 1 minecraft_server jar file.

When players log on, the 1.7 server is only about 40 to 60% cpu, but the 1.8 goes to 200 to 250%.. Screen shot is with 0 players logged in though.