--- C:/Users/bronek/AppData/Local/Temp/files.inc-revBASE.svn000.tmp.inc	Wed Jul 15 00:41:25 2009
+++ D:/bro/websites/wielkapolandia/trunk/sites/all/modules/contributions/[backup]/backup_migrate/includes/files.inc	Wed Jul 15 00:40:49 2009
@@ -331,9 +331,12 @@
         $header = preg_replace('/\r?\n(?!\t| )/', '', $header);
         drupal_set_header($header);
       }
-      // Transfer file in 1024 byte chunks to save memory usage.
-      while ($data = $this->read(1024)) {
-        print $data;
+      // Transfer file in 1024*8 byte chunks to save memory usage.
+      while ($data = $this->read(1024*8)) {
+        set_time_limit(0);  // reset time limit for big files
+        print $data;
+        flush();
+        ob_flush();
       }
       $this->close();