Update README.md

Author: maximecb

README.md

@@ -37,7 +37,7 @@ git clone https://github.com/Shopify/ruby.git yjit
 cd yjit
 ```
 
-The YJIT `ruby` binary can be built with either GCC or Clang. We recommend enabling debug symbols so that assertions are enabled during development as this makes debugging easier. More detailed build instructions are provided in the [Ruby README](https://github.com/ruby/ruby#how-to-compile-and-install).
+The YJIT `ruby` binary can be built with either GCC or Clang. We recommend enabling debug symbols so that assertions are enabled during development as this makes debugging easier. Enabling debug mode will also make it possible for you to disassemble code generated by YJIT, and get access to stat counters. More detailed build instructions are provided in the [Ruby README](https://github.com/ruby/ruby#how-to-compile-and-install).
 
 ```
 ./autogen.sh