### Measuring logstash filters performance

- given a data file sample named `data.log`
- modify your config to use the **stdin input** so that you can pipe you sample log file to logstash
```
input {
  stdin {
    codec => line
  }
}
```

- modify your config to use the **stdout output** with the **dots codec** 

```
output {
  stdout {
    codec => dots
  }
}
```

- continously send your sample data to logtash and check pv numbers

```sh
$ while true; do cat t.t; done | bin/logstash -f myconfig.conf | pv -Wbart  > /dev/null
10.6KiB 0:01:15 [ 631 B/s] [ 732 B/s]
```

Here `[ 631 B/s]` is the current throughput in events per second and `[ 732 B/s]` is the average throughput for the test duration