diff --git a/include/xo/object2/DArray.hpp b/include/xo/object2/DArray.hpp
index 8d7248e..282e0e5 100644
--- a/include/xo/object2/DArray.hpp
+++ b/include/xo/object2/DArray.hpp
@@ -112,6 +112,13 @@ namespace xo {
              **/
             bool resize(size_type new_size) noexcept;
 
+            /** reduce array capacity to current array size
+             *
+             *  note: with X1Collector, capacity is reduced but memory not recycled
+             *        until next collection
+             **/
+            void shrink_to_fit() noexcept;
+
             ///@}
             /** @defgroup darray-conversion-operators conversion operators **/
             ///@{
diff --git a/src/object2/DArray.cpp b/src/object2/DArray.cpp
index 31ced92..459b459 100644
--- a/src/object2/DArray.cpp
+++ b/src/object2/DArray.cpp
@@ -68,7 +68,8 @@ namespace xo {
         }
 
         bool
-        DArray::push_back(obj<AGCObject> elt) noexcept {
+        DArray::push_back(obj<AGCObject> elt) noexcept
+        {
             if (size_ >= capacity_) {
                 return false;
             } else {
@@ -85,7 +86,8 @@ namespace xo {
         }
 
         bool
-        DArray::resize(size_type new_z) noexcept {
+        DArray::resize(size_type new_z) noexcept
+        {
             if (new_z >= capacity_) {
                 return false;
             } else if (new_z > size_) {
@@ -97,6 +99,14 @@ namespace xo {
             return true;
         }
 
+        void
+        DArray::shrink_to_fit() noexcept
+        {
+            if (capacity_ > size_) {
+                this->capacity_ = size_;
+            }
+        }
+
         // printing support
 
         bool