Github user pvillard31 commented on the issue: https://github.com/apache/nifi/pull/2475 Few suggestions regarding existing processors: ExtractText and ReplaceText can also be CPU intensive when using some tricky regular expressions. Same goes for grok processors as well as TransformXML (depends of the XSLT). It's not true in most cases but it can be in some situations. Will try to continue the review early next week.
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