Update readme.md

Author: medegor44

Benchmarks/readme.md

@@ -1,3 +1,14 @@
+Benchmark tests
+===============
+
+How to run
+----------
+
+Benchmark test contains CharkaCore and ClearScriptV8 runners, which requres installed native binaries for your
+operating system. If you run tests under Windows x64, you don't need to install anything. If you run
+test under other OS, you have to install native binaries via nuget. We recommend these binaries for [ChakraCore](https://www.nuget.org/packages?q=JavaScriptEngineSwitcher.ChakraCore.Native) and these for [ClearScriptV8](https://www.nuget.org/packages?q=Microsoft.ClearScript.V8.Native).
+
+
 Interop benchmarks
 ------------------
 

readme.md

@@ -112,3 +112,8 @@ Jint               | ❌
 ChakraCore         | ✔
 ClearScriptV8      | ✔
 Moonsharp          | ❌
+
+Performance
+-----------
+
+We have written benchmark tests to investigate how fast runners works in some situations such as interoperating calls between .NET and scripting engine, integer and floating point computations. Results of benchmark test you can see [here](Benchmarks/readme.md).