diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7ce523441e9..a86146be12e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,9 @@
 
 ## 0.25.5
 
+* `Common`:
+  * Small performance optimization of `MutableMap.applyDiff`
+
 ## 0.25.4
 
 * `Versions`:
diff --git a/common/src/commonMain/kotlin/dev/inmo/micro_utils/common/MapDiff.kt b/common/src/commonMain/kotlin/dev/inmo/micro_utils/common/MapDiff.kt
index dc275c347d1..c3d5bfed2e9 100644
--- a/common/src/commonMain/kotlin/dev/inmo/micro_utils/common/MapDiff.kt
+++ b/common/src/commonMain/kotlin/dev/inmo/micro_utils/common/MapDiff.kt
@@ -82,13 +82,11 @@ fun <K, V> MutableMap<K, V>.applyDiff(
     mapDiff: MapDiff<K, V>
 ) {
     mapDiff.apply {
-        removed.keys.forEach { remove(it) }
+        keys.removeAll(removed.keys)
         changed.forEach { (k, oldNew) ->
             put(k, oldNew.second)
         }
-        added.forEach { (k, new) ->
-            put(k, new)
-        }
+        putAll(added)
     }
 }