Link to Bloop optimization ticket

Author: ashawley

blog/_posts/2018-06-04-scalac-profiling.md

@@ -1243,8 +1243,8 @@ Done compiling.
 It is safe to say it out loud now: we have reduced compilation time from 32.5
 seconds to 4 seconds. That's an **8x reduction in our compile time**.
 
-A great result taking into account that we've only modified around 30 lines
-of code.
+A great result taking into account that we've only [modified around 30 lines
+of code in Bloop](https://github.com/scalacenter/bloop/pull/509).
 
 ## Conclusion