akka/akka — pull request #15095 by ktoso (2014-04-29 15:45:44+00:00)
Title: =act,tes #15064 Initial MetricsKit draft as well as including it in ActorPerfSpec

The MetricsKit lives next to the AkkaSpec, and is private[akka]

Example output:

```
actor-creation.PropsnewEmptyArgsActorsame_warmup
count = 50000
mean rate = 7880.37 calls/second
1-minute rate = 10000.00 calls/second
5-minute rate = 10000.00 calls/second
15-minute rate = 10000.00 calls/second
min = 1.00 microseconds
max = 15.00 microseconds
mean = 3.77 microseconds
stddev = 1.72 microseconds
median = 3.00 microseconds
75% <= 4.75 microseconds
95% <= 6.00 microseconds
98% <= 9.00 microseconds
99% <= 12.00 microseconds
99.9% <= 14.97 microseconds
```

Example graphs in graphite:

![grafana_-_akka-actor](https://cloud.githubusercontent.com/assets/120979/2831075/5110665a-cfb5-11e3-9908-cb62c4a8c157.png)