Update Readme.md and added reference to support by YourKit

Author: vincenzopalazzo

README.md

@@ -138,8 +138,29 @@ Other screenshot you can found  [here](https://github.com/vincenzopalazzo/materi
 
 You can consult the javadoc at [this link](https://vincenzopalazzo.github.io/material-ui-swing/)
 
+## Built with
+
+- **[jIconFont-Swing](https://jiconfont.github.io/swing)**: It is a API to provide icons generated by any IconFont. These icons can be used in Swing. 
+
+## Performance
+
+![](https://www.yourkit.com/images/yklogo.png)
+
+From version 1.1.1 the material-ui-swing library will be support to YourKit and now th library will 
+start to increase the performance.
+
+Stay tuned that the future version 1.1.1 official will be more optimize.
+
+The YourKit is used also by Google, Microsoft, PayPal, ecc.
+
+- **YourKit**: it supports open source projects with innovative and intelligent tools
+for monitoring and profiling Java and .NET applications.
+YourKit is the creator of <a href="https://www.yourkit.com/java/profiler/">YourKit Java Profiler</a>,
+<a href="https://www.yourkit.com/.net/profiler/">YourKit .NET Profiler</a>,
+and <a href="https://www.yourkit.com/youmonitor/">YourKit YouMonitor</a>.
+
 ## Dev
 
 This is the official repository of material-ui-swing but the developing of a new feature we do in this
 in this repository [vincenzopalazzo/material-ui-swing](https://github.com/vincenzopalazzo/material-ui-swing) and after testing
-the official release will release in this branch.
+the official release will release in this branch.