After installing LanguageTool-stable.oxt, when a blank document is first opened and after you type the first word - CPU utilization hits 100% and stays that way for about 20 seconds. Then everything stabilizes and begins to work normally.
root@lin314b-01:~/ooo# cat /etc/issue
Ubuntu 12.04 LTS \n \l
root@lin314b-01:~/ooo# java -version
java version “1.7.0_03”
Java™ SE Runtime Environment (build 1.7.0_03-b04)
Java HotSpot™ 64-Bit Server VM (build 22.1-b02, mixed mode)
Tasks: 164 total, 2 running, 161 sleeping, 0 stopped, 1 zombie
Cpu(s): 19.7%us, 38.4%sy, 0.0%ni, 41.2%id, 0.7%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 4048232k total, 2637704k used, 1410528k free, 255904k buffers
Swap: 4191228k total, 0k used, 4191228k free, 1098440k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
9084 dhe 20 0 2719m 112m 71m R 100 2.8 0:05.65 soffice.bin