Hi ,
I am using performance testing to find out that the output is confusing, it
would be better if the output is supported to the file.
dubbo-benchmark: https://github.com/dubbo/dubbo-benchmark
Here is my test output:
```
# Fork: 1 of 1
# Warmup Iteration 1: Sep 12, 2018 2:22:31 PM
org.springframework.context.support.ClassPathXmlApplicationContext
prepareRefresh
信息: Refreshing
org.springframework.context.support.ClassPathXmlApplicationContext@44dc6a41:
startup date [Wed Sep 12 14:22:31 CST 2018]; root of context hierarchy
Sep 12, 2018 2:22:31 PM
org.springframework.beans.factory.xml.XmlBeanDefinitionReader
loadBeanDefinitions
信息: Loading XML bean definitions from class path resource [consumer.xml]
14:22:31.775 [org.apache.dubbo.benchmark.Client.listUser-jmh-worker-1] INFO
c.a.d.common.logger.LoggerFactory - using logger:
com.alibaba.dubbo.common.logger.slf4j.Slf4jLoggerAdapter
14:22:32.040 [org.apache.dubbo.benchmark.Client.listUser-jmh-worker-1] INFO
c.a.d.r.protocol.dubbo.DubboProtocol - [DUBBO] Optimizing the
serialization process for Kryo, FST, etc..., dubbo version: 2.6.1, current
host: 172.17.9.71
2.841 ±(99.9%) 0.015 ms/op
# Warmup Iteration 2: 2.464 ±(99.9%) 0.010 ms/op
# Warmup Iteration 3: 2.541 ±(99.9%) 0.007 ms/op
Iteration 1: 2.342 ±(99.9%) 0.005 ms/op
listUser·p0.00: 0.785 ms/op
```
Thanks
yiji
