diff --git a/src/malli/dev.clj b/src/malli/dev.clj
index bcb45de14..ced753d8d 100644
--- a/src/malli/dev.clj
+++ b/src/malli/dev.clj
@@ -8,7 +8,10 @@
   "Stops instrumentation for all functions vars and removes clj-kondo type annotations."
   []
   (remove-watch @#'m/-function-schemas* ::watch)
-  (mi/unstrument!)
+  (->> (mi/unstrument!)
+       count
+       (format "unstrumented %d vars")
+       println)
   (clj-kondo/save! {})
   (println "stopped instrumentation"))
 
@@ -22,13 +25,18 @@
    (with-out-str (stop!))
    (mi/collect! {:ns (all-ns)})
    (let [watch (fn [_ _ old new]
-                 (mi/instrument! (assoc options :data (->> (for [[n d] (:clj new)
-                                                                 :let [no (get-in old [:clj n])]
-                                                                 [s d] d
-                                                                 :when (not= d (get no s))]
-                                                             [[n s] d])
-                                                           (into {})
-                                                           (reduce-kv assoc-in {}))))
+                 (->> (for [[n d] (:clj new)
+                            :let [no (get-in old [:clj n])]
+                            [s d] d
+                            :when (not= d (get no s))]
+                        [[n s] d])
+                      (into {})
+                      (reduce-kv assoc-in {})
+                      (assoc options :data)
+                      mi/instrument!
+                      count
+                      (format "instrumented %d vars")
+                      println)
                  (clj-kondo/emit!))]
      (add-watch @#'m/-function-schemas* ::watch watch))
    (mi/instrument! options)
diff --git a/src/malli/instrument.clj b/src/malli/instrument.clj
index 9a37f4a02..0132a0c6d 100644
--- a/src/malli/instrument.clj
+++ b/src/malli/instrument.clj
@@ -14,24 +14,24 @@
 (defn -strument!
   ([] (-strument! nil))
   ([{:keys [mode data filters gen report] :or {mode :instrument, data (m/function-schemas)} :as options}]
-   (doseq [[n d] data, [s d] d]
-     (when (or (not filters) (some #(% n s d) filters))
-       (when-let [v (-find-var n s)]
-         (case mode
-           :instrument (let [original-fn (or (-original v) (deref v))
-                             dgen (as-> (merge (select-keys options [:scope :report :gen]) d) $
-                                    (cond-> $ report (update :report (fn [r] (fn [t data] (r t (assoc data :fn-name (symbol (name n) (name s))))))))
-                                    (cond (and gen (true? (:gen d))) (assoc $ :gen gen)
-                                          (true? (:gen d)) (dissoc $ :gen)
-                                          :else $))]
-                         (alter-meta! v assoc ::original-fn original-fn)
-                         (alter-var-root v (constantly (m/-instrument dgen original-fn)))
-                         (println "..instrumented" v))
-           :unstrument (when-let [original-fn (-original v)]
-                         (alter-meta! v dissoc ::original-fn)
-                         (alter-var-root v (constantly original-fn))
-                         (println "..unstrumented" v))
-           (mode v d)))))))
+   (doall
+    (for [[n d] data, [s d] d]
+      (when (or (not filters) (some #(% n s d) filters))
+        (when-let [v (-find-var n s)]
+          (case mode
+            :instrument (let [original-fn (or (-original v) (deref v))
+                              dgen (as-> (merge (select-keys options [:scope :report :gen]) d) $
+                                     (cond-> $ report (update :report (fn [r] (fn [t data] (r t (assoc data :fn-name (symbol (name n) (name s))))))))
+                                     (cond (and gen (true? (:gen d))) (assoc $ :gen gen)
+                                           (true? (:gen d)) (dissoc $ :gen)
+                                           :else $))]
+                          (alter-meta! v assoc ::original-fn original-fn)
+                          (alter-var-root v (constantly (m/-instrument dgen original-fn))))
+            :unstrument (when-let [original-fn (-original v)]
+                          (alter-meta! v dissoc ::original-fn)
+                          (alter-var-root v (constantly original-fn)))
+            (mode v d))
+          v))))))
 
 (defn -schema [v]
   (let [{:keys [malli/schema arglists]} (meta v)]