diff --git a/src/collections_me.c b/src/collections_me.c
index 4e7db5d..7624b8f 100644
--- a/src/collections_me.c
+++ b/src/collections_me.c
@@ -101,12 +101,24 @@ ZEND_BEGIN_ARG_INFO(copy_of_range_arginfo, 0)
     ZEND_ARG_TYPE_INFO(0, num_elements, IS_LONG, 0)
 ZEND_END_ARG_INFO()
 
-ZEND_BEGIN_ARG_INFO(fill_arginfo, 0)
+ZEND_BEGIN_ARG_INFO(element_from_to_arginfo, 0)
     ZEND_ARG_INFO(0, element)
     ZEND_ARG_TYPE_INFO(0, from_index, IS_LONG, 0)
     ZEND_ARG_TYPE_INFO(0, num_elements, IS_LONG, 0)
 ZEND_END_ARG_INFO()
 
+ZEND_BEGIN_ARG_INFO(binary_search_by_arginfo, 0)
+    ZEND_ARG_INFO(0, element)
+    ZEND_ARG_TYPE_INFO(0, from_index, IS_LONG, 0)
+    ZEND_ARG_TYPE_INFO(0, num_elements, IS_LONG, 0)
+    ZEND_ARG_CALLABLE_INFO(0, selector, 0)
+ZEND_END_ARG_INFO()
+
+ZEND_BEGIN_ARG_INFO(chuncked_arginfo, 0)
+    ZEND_ARG_TYPE_INFO(0, size, IS_LONG, 0)
+    ZEND_ARG_CALLABLE_INFO(0, transform, 0)
+ZEND_END_ARG_INFO()
+
 ZEND_BEGIN_ARG_INFO(get_arginfo, 0)
     ZEND_ARG_INFO(0, key)
     ZEND_ARG_INFO(0, default)
@@ -126,6 +138,9 @@ const zend_function_entry collection_methods[] = {
     PHP_ME(Collection, associateBy, associate_by_arginfo, ZEND_ACC_PUBLIC)
     PHP_ME(Collection, associateByTo, associate_by_to_arginfo, ZEND_ACC_PUBLIC)
     PHP_ME(Collection, average, NULL, ZEND_ACC_PUBLIC)
+    PHP_ME(Collection, binarySearch, element_from_to_arginfo, ZEND_ACC_PUBLIC)
+    PHP_ME(Collection, binarySearchBy, binary_search_by_arginfo, ZEND_ACC_PUBLIC)
+    PHP_ME(Collection, chunked, chuncked_arginfo, ZEND_ACC_PUBLIC)
     PHP_ME(Collection, containsAll, other_arginfo, ZEND_ACC_PUBLIC)
     PHP_ME(Collection, containsAllKeys, other_arginfo, ZEND_ACC_PUBLIC)
     PHP_ME(Collection, containsAllValues, other_arginfo, ZEND_ACC_PUBLIC)
@@ -140,7 +155,7 @@ const zend_function_entry collection_methods[] = {
     PHP_ME(Collection, dropLast, n_arginfo, ZEND_ACC_PUBLIC)
     PHP_ME(Collection, dropLastWhile, predicate_arginfo, ZEND_ACC_PUBLIC)
     PHP_ME(Collection, dropWhile, predicate_arginfo, ZEND_ACC_PUBLIC)
-    PHP_ME(Collection, fill, fill_arginfo, ZEND_ACC_PUBLIC)
+    PHP_ME(Collection, fill, element_from_to_arginfo, ZEND_ACC_PUBLIC)
     PHP_ME(Collection, filter, predicate_arginfo, ZEND_ACC_PUBLIC)
     PHP_ME(Collection, filterNot, predicate_arginfo, ZEND_ACC_PUBLIC)
     PHP_ME(Collection, filterNotTo, destination_predicate_arginfo, ZEND_ACC_PUBLIC)
diff --git a/src/collections_methods.c b/src/collections_methods.c
index 0df02b4..dcb5d60 100644
--- a/src/collections_methods.c
+++ b/src/collections_methods.c
@@ -877,6 +877,21 @@ PHP_METHOD(Collection, average)
     RETVAL_DOUBLE(sum / zend_hash_num_elements(current));
 }
 
+PHP_METHOD(Collection, binarySearch)
+{
+
+}
+
+PHP_METHOD(Collection, binarySearchBy)
+{
+    
+}
+
+PHP_METHOD(Collection, chunked)
+{
+    
+}
+
 PHP_METHOD(Collection, containsAll)
 {
     zval* elements;
diff --git a/src/php_collections_me.h b/src/php_collections_me.h
index 32f3da2..c2344b5 100644
--- a/src/php_collections_me.h
+++ b/src/php_collections_me.h
@@ -18,6 +18,9 @@ PHP_METHOD(Collection, associateTo);
 PHP_METHOD(Collection, associateBy);
 PHP_METHOD(Collection, associateByTo);
 PHP_METHOD(Collection, average);
+PHP_METHOD(Collection, binarySearch);
+PHP_METHOD(Collection, binarySearchBy);
+PHP_METHOD(Collection, chunked);
 PHP_METHOD(Collection, containsAll);
 PHP_METHOD(Collection, containsAllKeys);
 PHP_METHOD(Collection, containsAllValues);
diff --git a/stubs/Collection.php b/stubs/Collection.php
index 2996e35..9e51999 100644
--- a/stubs/Collection.php
+++ b/stubs/Collection.php
@@ -92,6 +92,44 @@ class Collection implements ArrayAccess, Countable
      */
     function average() {}
 
+    /**
+     * Searches the array or the range of the array for the provided element using the
+     * binary search algorithm.
+     * 
+     * The array is expected to be packed and sorted, otherwise the result is undefined.
+     * 
+     * @param mixed $element
+     * @param int $from_index[optional]
+     * @param int $num_elements[optional]
+     * @return int|null
+     */
+    function binarySearch($element, $from_index, $num_elements) {}
+
+    /**
+     * Searches the array or the range of the array for the provided element using the
+     * binary search algorithm, where the element equals to the one returned by the
+     * corresponding selector function.
+     * 
+     * The array is expected to be packed and sorted, otherwise the result is undefined.
+     * 
+     * @param mixed $element
+     * @param int $from_index[optional]
+     * @param int $num_elements[optional]
+     * @param callable $selector ($value, $key) -> $new_value
+     * @return int|null
+     */
+    function binarySearchBy($element, $from_index, $num_elements, $selector) {}
+
+    /**
+     * Splits this collection into a collection of arrays each not exceeding the given size.
+     * 
+     * If the transform function is provided, apply it on each array.
+     * 
+     * @param int $size
+     * @param callable $transform[optional] ($value, $key) -> $new_value
+     */
+    function chunked($size, $transform) {}
+
     /**
      * Checks if all key-value pairs in the specified collection are contained in this collection.
      *