Java never stops using about 25% cpu. Killing the process does not help as launchd restarts it right away.
That's with every other process pretty much idle.
Macbook pro Mid 2010 - i7
Analysis of sampling java (pid 7819) every 1 millisecond
Process: java [7819]
Path: /System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home/bin/java
Load Address: 0x101d4f000
Identifier: java
Version: 1.0 (1.0)
Code Type: X86-64 (Native)
Parent Process: launchd [1]
That's with every other process pretty much idle.
Macbook pro Mid 2010 - i7
Analysis of sampling java (pid 7819) every 1 millisecond
Process: java [7819]
Path: /System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home/bin/java
Load Address: 0x101d4f000
Identifier: java
Version: 1.0 (1.0)
Code Type: X86-64 (Native)
Parent Process: launchd [1]