diff --git a/src/Readers/JsonReader.php b/src/Readers/JsonReader.php
index 8cb6f1b..c37746f 100644
--- a/src/Readers/JsonReader.php
+++ b/src/Readers/JsonReader.php
@@ -30,7 +30,7 @@ class JsonReader implements ReaderInterface, Iterator
         if ($this->currentFile === $this->loadedFile) return;
 
         if ($this->currentFile >= count($this->files)) {
-            printf("Reached end of set at slice=%d\n", $this->currentFile);
+            //printf("Reached end of set at slice=%d\n", $this->currentFile);
             return;
         }
         $file = $this->files[$this->currentFile]; 
@@ -38,7 +38,7 @@ class JsonReader implements ReaderInterface, Iterator
 
         $this->loadData($json);
         $this->loadedFile = $this->currentFile;
-        printf("loaded slice %d: %s\n", $this->currentFile, $file);
+        //printf("loaded slice %d: %s\n", $this->currentFile, $file);
     }
 
     private function loadData(array $data)
@@ -53,7 +53,7 @@ class JsonReader implements ReaderInterface, Iterator
         $this->currentFile = 0;
         $this->currentIndex = 0;
         $this->counter = 0;
-        printf("Rewinding to slice=%d index=%d\n", $this->currentFile, $this->currentIndex);
+        //printf("Rewinding to slice=%d index=%d\n", $this->currentFile, $this->currentIndex);
         $this->checkLoadedSlice();
     }
 
@@ -77,7 +77,7 @@ class JsonReader implements ReaderInterface, Iterator
         if ($this->currentIndex >= count($this->data)) {
             $this->currentFile++;
             $this->currentIndex = 0;
-            printf("Rolling over to slice=%d index=%d counter=%d\n", $this->currentFile, $this->currentIndex, $this->counter);
+            //printf("Rolling over to slice=%d index=%d counter=%d\n", $this->currentFile, $this->currentIndex, $this->counter);
         }
 
         //$this->checkLoadedSlice();   
@@ -89,4 +89,4 @@ class JsonReader implements ReaderInterface, Iterator
         return ($this->currentFile < count($this->files) && ($this->currentIndex < count($this->data)));
         
     }
-}
\ No newline at end of file
+}