diff --git a/ch04.jl b/ch04.jl
index 3db6eb4..2ef7950 100644
--- a/ch04.jl
+++ b/ch04.jl
@@ -38,6 +38,11 @@ using BenchmarkTools
 @benchmark (1, 2, 3)
 @benchmark [1, 2, 3]
 
+# Code comparing vector and tuple construction
+
+[1, 1.0]
+(1, 1.0)
+
 # Code for section 4.1.2
 
 using Statistics