Add a micro-optimization chapter?

mbrubeck · mbrubeck · commit 300571accef6 · 2017-01-11T10:43:57.000-08:00
diff --git a/notes/outline.txt b/notes/outline.txt
@@ -86,6 +86,7 @@ Specific optimizations
       UTF-8, indexing, iterating
       str vs. [char] vs. [u8]
       regex crate
+  Common micro-optimizations
   Threads
     channels
     scoped threads
