diff --git a/performance.md b/performance.md
index 275b73a..ab03f88 100644
--- a/performance.md
+++ b/performance.md
@@ -821,6 +821,11 @@ Techniques specific to the architecture running the code
 * Comment about Jeff Dean's 2002 numbers (plus updates)
   * cpus have gotten faster, but memory hasn't kept up
 
+## Concurrency
+
+* Optimizing multi-threaded code
+* Overlap with previous section on caches and false/true sharing
+
 ## Assembly
 
 * Stuff about writing assembly code for Go