telegraf: Procstat plugin causes higher cpu with telegraf 15.1 release

Relevant telegraf.conf:

# [[inputs.logparser]]
#   files = ["/location/www/some/logs/*_log.*"]

#   from_beginning = false
#   watch_method = "poll"

# [inputs.logparser.grok]
#   patterns = ["%{COMBINED_LOG_FORMAT}"]
#   measurement = "web1_some_apache_access_log"
#   timezone = "America/New_York"

System info:

Telegraf ver 15.1 and Rhel version 7.3

Docker

Steps to reproduce:

1. install telegraf 15.1
2. start telegraf 3.) with logparser and procstat the cpu is very high actually unacceptable levels. Even with those two disabled the cpu is at 5 % which is still very high for this kind of monitoring.

Expected behavior:

The cpu just jumped to more than 120% the expected cpu usage for telegraf should be more than 1% or 2 %.

Actual behavior:

Additional info: