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# Cyclone DDS
Cyclone DDS is by far the most performant and robust DDS implementation available on the market.
Beside, Cyclone DDS is developed completely in the open and is undergoing the acceptance process to become part of Eclipse IoT (see [eclipse-cyclone-dds](https://projects.eclipse.org/proposals/eclipse-cyclone-dds)).
# Getting Started
## Building Cyclone DDS
In order to build cyclone DDS you need to have installed on your host [cmake](https://cmake.org/download/) **v3.6.0** or higher, the [Java 8 JDK](http://www.oracle.com/technetwork/java/javase/downloads/jdk8-downloads-2133151.html) or simply the [Java 8 RE](http://www.oracle.com/technetwork/java/javase/downloads/server-jre8-downloads-2133154.html), and [Apache Maven 3.5.x or higher](http://maven.apache.org/download.cgi).
Assuming that **git** is also available on your machine then, simply do:
$ git clone https://github.com/eclipse/cyclonedds.git
$ cd cyclonedds
$ mkdir build
$ cd build
$ cmake ../src
$ make
$ make install
At this point you are ready to use **cyclonedds** for your next DDS project!
## Examples
Now that you have built and installed **cyclonecdds** it is time to experiment with some examples.
### Building and Running the Roundtrip Example
The first example we will show you how to build and run, measures cyclonedds latency and will allow you to see with your eyes how fast it is!
Do as follows:
$ cd cyclonedds/src/examples/roundtrip
$ mkdir build
$ cd build
$ cmake ..
$ make
Now that you've build the roundtrip example it is time to run it.
On one terminal start the applications that will be responding to **cyclonedds** pings.
$ ./RoundtripPong
On another terminal, start the application that will be sending the ping.
$ ./RoundtripPing 0 0 0
# payloadSize: 0 | numSamples: 0 | timeOut: 0
# Waiting for startup jitter to stabilise
# Warm up complete.
# Round trip measurements (in us)
#. Round trip time [us] Write-access time [us] Read-access time [us]
# Seconds Count Median Min Count Median Min Count Median Min
1 13476 70 66 13476 14 12 13476 2 1
2 11972 73 66 11972 14 13 11972 2 1
3 13109 71 67 13109 14 12 13109 2 1
4 12259 72 67 12259 14 12 12259 2 1
5 12928 71 67 12928 14 12 12928 2 1
The number above were measure on a 13' MacBook pro running a 3,1 GHz Intel Core i5. From these number you can see how the roundtrip is incredibly stable and the minimal latency is slightly over 30 micro-seconds (on this HW).
## Documentation
The Cyclone DDS documentation is available [here](http://cdds.io/docs).