diff --git a/scripts/benchmarks.clj b/scripts/benchmarks.clj
index 0516f52..61aa268 100644
--- a/scripts/benchmarks.clj
+++ b/scripts/benchmarks.clj
@@ -1,6 +1,7 @@
 (ns com.rpl.specter.benchmarks
   (:use [com.rpl.specter]
         [com.rpl.specter macros]
+        [com.rpl.specter.transient]
         [com.rpl.specter.impl :only [benchmark]])
   (:require [clojure.walk :as walk]))
 
@@ -141,3 +142,46 @@
     (tree-value-transform (fn [e] (if (even? e) (inc e) e)) data)
     ))
 
+(run-benchmark "transient comparison: building up vectors"
+  6
+  10000
+  (reduce (fn [v i] (conj v i)) [] (range 1000))
+  (reduce (fn [v i] (conj! v i)) (transient []) (range 1000))
+  ;; uncomment this when END is fast
+  #_(reduce (fn [v i] (setval [END] [i] v)) [] (range 1000))
+  (setval [END!] (range 1000) (transient []))
+  (reduce (fn [v i] (setval [END!] [i] v)) (transient []) (range 1000)))
+
+(let [data (vec (range 1000))
+      tdata (transient data)]
+  (run-benchmark "transient comparison: assoc'ing in vectors"
+    6
+    500000
+    (assoc data (rand-int 1000) 0)
+    (assoc! tdata (rand-int 1000) 0)
+    (setval [(keypath (rand-int 1000))] 0 data)
+    (setval [(keypath! (rand-int 1000))] 0 tdata)))
+
+(let [data (into {} (for [k (range 1000)]
+                      [k (rand)]))
+      tdata (transient data)]
+  (run-benchmark "transient comparison: assoc'ing in maps"
+    6
+    500000
+    (assoc data (rand-int 1000) 0)
+    (assoc! tdata (rand-int 1000) 0)
+    (setval [(keypath (rand-int 1000))] 0 data)
+    (setval [(keypath! (rand-int 1000))] 0 tdata)))
+
+(defn modify-submap
+  [m]
+  (assoc m 0 1 458 89))
+
+(let [data (into {} (for [k (range 1000)]
+                      [k (rand)]))
+      tdata (transient data)]
+  (run-benchmark "transient comparison: submap"
+    6
+    300000
+    (transform [(submap [(rand-int 1000)])] modify-submap data)
+    (transform [(submap! [(rand-int 1000)])] modify-submap tdata)))