Added check for changes in parameters by checksum calculation to reduce write cycles to disk

worker.php

@@ -80,6 +80,7 @@ function queryMonitors() {
         $lastStatus = [];
         if( is_file($statusFile) )
             $lastStatus = json_decode( file_get_contents( $statusFile ), true );
+        $checksum = hash( 'sha256', json_encode($lastStatus) );
 
         // process configured monitors
         foreach($config->monitors as $monitor) {
@@ -112,7 +113,8 @@ function queryMonitors() {
                 }
            }
         }
-        file_put_contents( $statusFile, json_encode($lastStatus) );
+        if( hash( 'sha256', json_encode($lastStatus) ) !== $checksum)
+            file_put_contents( $statusFile, json_encode($lastStatus) );
     }
 }