Github user shinrich commented on the pull request:
https://github.com/apache/trafficserver/pull/598#issuecomment-214463886
@jacksontj the way we are using it on the log entries is as a boolean (zero
or non-zero) to understand whether that request was able to reuse an existing
origin connection. We are doing log analysis at various levels (requesting
clients, domains, etc) and merging up attributes.
@jpeach I think I had done some performance analysis on this a while back,
and it didn't seem to have a significant impact. I'll repeat that analysis and
provide more concrete impact #'s.
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