diff --git a/src/clojure_through_code/benchmark.clj b/src/clojure_through_code/benchmark.clj
new file mode 100644
index 0000000..da1ec5d
--- /dev/null
+++ b/src/clojure_through_code/benchmark.clj
@@ -0,0 +1,49 @@
+(ns clojure-through-code.benchmark
+  (:require [criterium.core :refer [quick-bench]]))
+
+
+;; cond
+(let [number 5]
+  (quick-bench (cond = 5 1 1 2 2 3 3 4 4 5 5)))
+
+;; Evaluation count : 50788488 in 6 samples of 8464748 calls.
+;; Execution time mean : 2.535916 ns
+;; Execution time std-deviation : 0.096838 ns
+;; Execution time lower quantile : 2.435814 ns ( 2.5%)
+;; Execution time upper quantile : 2.686146 ns (97.5%)
+;; Overhead used : 9.431514 ns
+
+;; Found 1 outliers in 6 samples (16.6667 %)
+;; low-severe  1 (16.6667 %)
+;; Variance from outliers : 13.8889 % Variance is moderately inflated by outliers
+
+
+(let [number 5]
+  (quick-bench (condp = 5 1 1 2 2 3 3 4 4 5 5)))
+
+;; Evaluation count : 3625284 in 6 samples of 604214 calls.
+;; Execution time mean : 156.813816 ns
+;; Execution time std-deviation : 2.560629 ns
+;; Execution time lower quantile : 154.222522 ns ( 2.5%)
+;; Execution time upper quantile : 160.425030 ns (97.5%)
+;; Overhead used : 9.431514 ns
+
+;; Found 1 outliers in 6 samples (16.6667 %)
+;; low-severe  1 (16.6667 %)
+;; Variance from outliers : 13.8889 % Variance is moderately inflated by outliers
+
+
+
+(let [number 5]
+  (quick-bench (case 5 1 1 2 2 3 3 4 4 5 5)))
+
+;; Evaluation count : 56533626 in 6 samples of 9422271 calls.
+;; Execution time mean : 1.158650 ns
+;; Execution time std-deviation : 0.187322 ns
+;; Execution time lower quantile : 1.021431 ns ( 2.5%)
+;; Execution time upper quantile : 1.471115 ns (97.5%)
+;; Overhead used : 9.431514 ns
+
+;; Found 1 outliers in 6 samples (16.6667 %)
+;; low-severe   1 (16.6667 %)
+;; Variance from outliers : 47.5092 % Variance is moderately inflated by outliers