Allow Skipping Metrics Publishing Based on a Condition

[hrothwell]

Feature description

Looking for the ability to selectively exclude publishing an @Timed and @Counted metric.

Example use case:

• a method is tagged with @Timed, this method is called a significant amount of times during processing, enough so that removing the annotation/metrics for this method reduces in the average time to process by 50%.
  • disclaimer: the metric also utilizes AbstractMethodTagger to do additional processing/method tagging. The tagger appends a method name tag using the method invocation context / checks if a class name matches something in particular.
  • In our specific use case we saw avg drop by 500ms, p95 dropped by 1.25s, and p99 dropped by 1s.
• we still would like to have this method publish metrics in non-prod environments, but turn it off in production for additional performance benefits when applicable