Filebeat7.2 cpu over 100% all time

Hi:
i use filebeat7.2 for log collect,have a strange situation,when i'm not output more info to terminal,run like this:./filebeat -e -c filebeat.yml,filebeat cost the CPU above 100%,if i run filebeat like this:./filebeat -e -c filebeat.yml -d "*",the CPU usage drop to few percent,can help to explain it,thanks!
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