Sourced from github.com/armon/go-metrics's releases.
v0.4.1
Includes a performance improvement in the Prometheus sink that was identified as wasting CPU time in Nomad where metrics are recorded in a hot code path.
b6d5c86 Merge pull request #138 from jrasell/jrasell/f-improve-prom-flatten-key-perf2a21e9d prometheus: improve flatten key performance.