Add timing information for backups

src/taskworker.js

@@ -47,6 +47,7 @@ function initialize(callback) {
 }
 
 // Main process starts here
+const startTime = new Date();
 debug(`Starting task ${taskId}`);
 
 initialize(function (error) {
@@ -63,6 +64,8 @@ initialize(function (error) {
                 error: error ? JSON.parse(JSON.stringify(error, Object.getOwnPropertyNames(error))) : null
             };
 
+            debug(`Task took ${(new Date() - startTime)/1000} seconds`);
+
             tasks.setCompleted(taskId, progress, () => process.exit(error ? 50 : 0));
         };