optimizing process.send for js minification

loader.js

@@ -122,15 +122,11 @@ Loader.addWorkerEvents = function(worker) {
 					Loader.reload();
 				break;
 				case 'js-propagate':
-					Loader.js.target[message.target] = Loader.js.target[message.target] || {};
+					Loader.js.target = message.data;
-					Loader.js.target[message.target].cache = message.cache;
-					Loader.js.target[message.target].map = message.map;
 
 					Loader.notifyWorkers({
 						action: 'js-propagate',
-						cache: message.cache,
+						data: message.data
-						map: message.map,
-						target: message.target
 					}, worker.pid);
 				break;
 				case 'css-propagate':

src/meta/js.js

@@ -112,12 +112,10 @@ module.exports = function(Meta) {
 				winston.verbose('[meta/js] ' + target + ' minification complete');
 				minifier.kill();
 
-				if (process.send) {
+				if (process.send && Meta.js.target.length > 1) {
 					process.send({
 						action: 'js-propagate',
-						cache: Meta.js.target[target].cache,
+						data: Meta.js.target
-						map: Meta.js.target[target].map,
-						target: target
 					});
 				}