diff --git a/src/wp-includes/widgets/class-wp-widget-recent-posts.php b/src/wp-includes/widgets/class-wp-widget-recent-posts.php
index 512009dde9..f6308d9c2a 100644
--- a/src/wp-includes/widgets/class-wp-widget-recent-posts.php
+++ b/src/wp-includes/widgets/class-wp-widget-recent-posts.php
@@ -20,10 +20,6 @@ class WP_Widget_Recent_Posts extends WP_Widget {
 		$widget_ops = array('classname' => 'widget_recent_entries', 'description' => __( "Your site’s most recent Posts.") );
 		parent::__construct('recent-posts', __('Recent Posts'), $widget_ops);
 		$this->alt_option_name = 'widget_recent_entries';
-
-		add_action( 'save_post', array($this, 'flush_widget_cache') );
-		add_action( 'deleted_post', array($this, 'flush_widget_cache') );
-		add_action( 'switch_theme', array($this, 'flush_widget_cache') );
 	}
 
 	/**
@@ -31,26 +27,10 @@ class WP_Widget_Recent_Posts extends WP_Widget {
 	 * @param array $instance
 	 */
 	public function widget( $args, $instance ) {
-		$cache = array();
-		if ( ! $this->is_preview() ) {
-			$cache = wp_cache_get( 'widget_recent_posts', 'widget' );
-		}
-
-		if ( ! is_array( $cache ) ) {
-			$cache = array();
-		}
-
 		if ( ! isset( $args['widget_id'] ) ) {
 			$args['widget_id'] = $this->id;
 		}
 
-		if ( isset( $cache[ $args['widget_id'] ] ) ) {
-			echo $cache[ $args['widget_id'] ];
-			return;
-		}
-
-		ob_start();
-
 		$title = ( ! empty( $instance['title'] ) ) ? $instance['title'] : __( 'Recent Posts' );
 
 		/** This filter is documented in wp-includes/widgets/class-wp-widget-pages.php */
@@ -99,13 +79,6 @@ class WP_Widget_Recent_Posts extends WP_Widget {
 		wp_reset_postdata();
 
 		endif;
-
-		if ( ! $this->is_preview() ) {
-			$cache[ $args['widget_id'] ] = ob_get_flush();
-			wp_cache_set( 'widget_recent_posts', $cache, 'widget' );
-		} else {
-			ob_end_flush();
-		}
 	}
 
 	/**
@@ -118,22 +91,9 @@ class WP_Widget_Recent_Posts extends WP_Widget {
 		$instance['title'] = sanitize_text_field( $new_instance['title'] );
 		$instance['number'] = (int) $new_instance['number'];
 		$instance['show_date'] = isset( $new_instance['show_date'] ) ? (bool) $new_instance['show_date'] : false;
-		$this->flush_widget_cache();
-
-		$alloptions = wp_cache_get( 'alloptions', 'options' );
-		if ( isset($alloptions['widget_recent_entries']) )
-			delete_option('widget_recent_entries');
-
 		return $instance;
 	}
 
-	/**
-	 * @access public
-	 */
-	public function flush_widget_cache() {
-		wp_cache_delete('widget_recent_posts', 'widget');
-	}
-
 	/**
 	 * @param array $instance
 	 */