tree 7bb91636a39cf16f38bd294cfee0a8b20258e92c
parent e0e90e172a1dee138c0e2eef43366a9f92302dd4
author Stephan Erb <serb@apache.org> 1521450603 +0000
committer Stephan Erb <serb@apache.org> 1521450603 +0000

Switch Thermos to lazy log formatting

This is the first part of a small series of Thermos observer performance
improvements.

As a first iteration, this switches all logging to use the logger-embedded
formatting rather than doing it eager up front. This has the advantage that
we produce less garbage if debug logging is disabled.

Reviewed at https://reviews.apache.org/r/66136/