1 files changed, 0 insertions, 66 deletions
diff --git a/js/vapi-background.js b/js/vapi-background.js
index 6c874f3..0da0638 100644
--- a/js/vapi-background.js
+++ b/js/vapi-background.js
@@ -69,72 +69,6 @@
 	}
     };
 
-    let CallbackWrapper = function (messageManager, channelName,
-				    listenerId, requestId) {
-	// This allows to avoid creating a closure for every single
-	// message which expects an answer. Having a closure created
-	// each time a message is processed has been always bothering
-	// me. Another benefit of the implementation here is to reuse
-	// the callback proxy object, so less memory churning.
-	//
-	// https://developers.google.com/speed/articles/optimizing-javascript
-	// "Creating a closure is significantly slower then creating
-	// an inner function without a closure, and much slower than
-	// reusing a static function"
-	//
-	// http://hacksoflife.blogspot.ca/2015/01/the-four-horsemen-of-performance.html
-	// "the dreaded 'uniformly slow code' case where every
-	// function takes 1% of CPU and you have to make one hundred
-	// separate performance optimizations to improve performance
-	// at all"
-	//
-	// http://jsperf.com/closure-no-closure/2
-	this.callback = this.proxy.bind(this); // bind once
-	this.init(messageManager, channelName, listenerId, requestId);
-    };
-
-    CallbackWrapper.junkyard = [];
-
-    CallbackWrapper.factory = function (messageManager, channelName,
-					listenerId, requestId) {
-	let wrapper = CallbackWrapper.junkyard.pop();
-	if (wrapper) {
-            wrapper.init(messageManager, channelName, listenerId, requestId);
-            return wrapper;
-	}
-	
-	return new CallbackWrapper(messageManager, channelName,
-				   listenerId, requestId);
-    };
-
-    CallbackWrapper.prototype.init = function (messageManager, channelName,
-					       listenerId, requestId) {
-	this.messageManager = messageManager;
-	this.channelName = channelName;
-	this.listenerId = listenerId;
-	this.requestId = requestId;
-    };
-
-    CallbackWrapper.prototype.proxy = function (response) {
-	let message = JSON.stringify({
-            requestId: this.requestId,
-            channelName: this.channelName,
-            msg: response !== undefined ? response : null
-	});
-
-	if (this.messageManager.sendAsyncMessage) {
-            this.messageManager.sendAsyncMessage(this.listenerId, message);
-	} else {
-            this.messageManager.broadcastAsyncMessage(this.listenerId, message);
-	}
-
-	// Mark for reuse
-	this.messageManager = this.channelName =
-	    this.requestId = this.listenerId = null;
-	
-	CallbackWrapper.junkyard.push(this);
-    };
-
     let httpRequestHeadersFactory = function (channel) {
 	let entry = httpRequestHeadersFactory.junkyard.pop();
 	if (entry) {