From 6c40711f737565e797740d6fcd90b58eccd733f5 Mon Sep 17 00:00:00 2001
From: Andrew Miner <andrewminer@mac.com>
Date: Sun, 1 Mar 2015 12:08:04 -0800
Subject: [PATCH] Improve perf. of mod version parsing

Add a SimpleStack model which is identical to the regular Stack model
except for not being a Backbone.Model subclass.  Since so many stacks
are created during mod version parsing, this makes about a 50%
difference in performance during loading.
---
 .../mod_version_parser_v1.coffee              |  2 +-
 src/scripts/models/simple_stack.coffee        | 22 +++++++++++++++++++
 2 files changed, 23 insertions(+), 1 deletion(-)
 create mode 100644 src/scripts/models/simple_stack.coffee

diff --git a/src/scripts/models/parser_versions/mod_version_parser_v1.coffee b/src/scripts/models/parser_versions/mod_version_parser_v1.coffee
index 1147c3c1e..3540ff702 100644
--- a/src/scripts/models/parser_versions/mod_version_parser_v1.coffee
+++ b/src/scripts/models/parser_versions/mod_version_parser_v1.coffee
@@ -10,7 +10,7 @@ Item                     = require '../item'
 ItemSlug                 = require '../item_slug'
 ModVersion               = require '../mod_version'
 Recipe                   = require '../recipe'
-Stack                    = require '../stack'
+Stack                    = require '../simple_stack'
 StringBuilder            = require '../string_builder'
 
 ########################################################################################################################
diff --git a/src/scripts/models/simple_stack.coffee b/src/scripts/models/simple_stack.coffee
new file mode 100644
index 000000000..bf495a6b3
--- /dev/null
+++ b/src/scripts/models/simple_stack.coffee
@@ -0,0 +1,22 @@
+###
+Crafting Guide - simple_stack.coffee
+
+Copyright (c) 2014-2015 by Redwood Labs
+All rights reserved.
+###
+
+########################################################################################################################
+
+module.exports = class Stack
+
+    constructor: (attributes={}, options={})->
+        if not attributes.itemSlug? then throw new Error 'attributes.itemSlug is required'
+        attributes.quantity ?= 1
+
+        @itemSlug = attributes.itemSlug
+        @quantity = attributes.quantity
+
+    # Object Overrides #############################################################################
+
+    toString: ->
+        return "#{@quantity} #{@itemSlug}"