diff --git a/src/collections_me.c b/src/collections_me.c
index 571eff4..e7f3ed0 100644
--- a/src/collections_me.c
+++ b/src/collections_me.c
@@ -183,6 +183,7 @@ const zend_function_entry collection_methods[] = {
     PHP_ME(Collection, minusValuesAssign, elements_arginfo, ZEND_ACC_PUBLIC)
     PHP_ME(Collection, none, predicate_arginfo, ZEND_ACC_PUBLIC)
     PHP_ME(Collection, onEach, action_arginfo, ZEND_ACC_PUBLIC)
+    PHP_ME(Collection, packed, NULL, ZEND_ACC_PUBLIC)
     PHP_ME(Collection, partition, predicate_arginfo, ZEND_ACC_PUBLIC)
     PHP_ME(Collection, plus, elements_arginfo, ZEND_ACC_PUBLIC)
     PHP_ME(Collection, plusAssign, elements_arginfo, ZEND_ACC_PUBLIC)
diff --git a/src/collections_methods.c b/src/collections_methods.c
index 332a200..d69d23a 100644
--- a/src/collections_methods.c
+++ b/src/collections_methods.c
@@ -1217,6 +1217,12 @@ PHP_METHOD(Collection, onEach)
     RETVAL_ZVAL(getThis(), 1, 0);
 }
 
+PHP_METHOD(Collection, packed)
+{
+    zend_array* current = COLLECTION_FETCH_CURRENT();
+    RETVAL_BOOL(HT_IS_PACKED(current));
+}
+
 PHP_METHOD(Collection, partition)
 {
     zend_fcall_info fci;
@@ -1301,27 +1307,25 @@ PHP_METHOD(Collection, reduce)
         RETURN_NULL();
     }
     INIT_FCI(3);
-    zval acc;
     Bucket* bucket = current->arData;
     Bucket* end = bucket + current->nNumUsed;
     for (; bucket < end; ++bucket) {
         if (Z_ISUNDEF(bucket->val))
             continue;
-        ZVAL_COPY_VALUE(&acc, &(bucket++)->val);
+        ZVAL_COPY(&retval, &(bucket++)->val);
         break;
     }
     for (; bucket < end; ++bucket) {
         if (Z_ISUNDEF(bucket->val))
             continue;
-        ZVAL_COPY_VALUE(&params[0], &acc);
+        ZVAL_COPY_VALUE(&params[0], &retval);
         ZVAL_COPY_VALUE(&params[1], &bucket->val);
         if (bucket->key)
             ZVAL_STR(&params[2], bucket->key);
         else
             ZVAL_LONG(&params[2], bucket->h);
         zend_call_function(&fci, &fcc);
-        zval_ptr_dtor(&acc);
-        ZVAL_COPY_VALUE(&acc, &retval);
+        zval_ptr_dtor(&params[0]);
     }
     RETVAL_ZVAL(&retval, 0, 0);
 }
@@ -1339,27 +1343,25 @@ PHP_METHOD(Collection, reduceRight)
         RETURN_NULL();
     }
     INIT_FCI(3);
-    zval acc;
     Bucket* start = current->arData;
     Bucket* bucket = start + current->nNumUsed - 1;
     for (; bucket >= start; --bucket) {
         if (Z_ISUNDEF(bucket->val))
             continue;
-        ZVAL_COPY_VALUE(&acc, &(bucket--)->val);
+        ZVAL_COPY(&retval, &(bucket--)->val);
         break;
     }
     for (; bucket >= start; --bucket) {
         if (Z_ISUNDEF(bucket->val))
             continue;
-        ZVAL_COPY_VALUE(&params[0], &acc);
+        ZVAL_COPY_VALUE(&params[0], &retval);
         ZVAL_COPY_VALUE(&params[1], &bucket->val);
         if (bucket->key)
             ZVAL_STR(&params[2], bucket->key);
         else
             ZVAL_LONG(&params[2], bucket->h);
         zend_call_function(&fci, &fcc);
-        zval_ptr_dtor(&acc);
-        ZVAL_COPY_VALUE(&acc, &retval);
+        zval_ptr_dtor(&params[0]);
     }
     RETVAL_ZVAL(&retval, 0, 0);
 }
diff --git a/src/php_collections_me.h b/src/php_collections_me.h
index 90e1f39..287d915 100644
--- a/src/php_collections_me.h
+++ b/src/php_collections_me.h
@@ -69,6 +69,7 @@ PHP_METHOD(Collection, minusValues);
 PHP_METHOD(Collection, minusValuesAssign);
 PHP_METHOD(Collection, none);
 PHP_METHOD(Collection, onEach);
+PHP_METHOD(Collection, packed);
 PHP_METHOD(Collection, partition);
 PHP_METHOD(Collection, plus);
 PHP_METHOD(Collection, plusAssign);
diff --git a/stubs/Collection.php b/stubs/Collection.php
index baa96a2..7ccd75f 100644
--- a/stubs/Collection.php
+++ b/stubs/Collection.php
@@ -568,6 +568,13 @@ class Collection implements ArrayAccess, Countable
      */
     function onEach($action) {}
 
+    /**
+     * Check whether the collection wraps a packed hashtable (regular array).
+     *
+     * @return bool
+     */
+    function packed() {}
+
     /**
      * Splits the original collection into pair of collections, where first collection contains
      * elements for which predicate yielded true, while second collection contains elements for
diff --git a/tests/040-packed.phpt b/tests/040-packed.phpt
new file mode 100644
index 0000000..7f47f05
--- /dev/null
+++ b/tests/040-packed.phpt
@@ -0,0 +1,11 @@
+--TEST--
+Test Collection::packed().
+--FILE--
+<?php
+$case = Collection::init(['a', 'b', 'c'])->packed();
+$case1 = Collection::init(['foo' => 'bar', 'baz'])->packed();
+$case2 = Collection::init()->packed();
+if (!$case || $case1 || $case2)
+    echo 'Collection::packed() failed.', PHP_EOL;
+?>
+--EXPECT--