From 2c3e9fbc07429a820bb9573900426b7b9f1568e3 Mon Sep 17 00:00:00 2001
From: Logan Smyth <loganfsmyth@gmail.com>
Date: Sun, 14 Jun 2015 20:23:00 -0700
Subject: [PATCH] Initialize properties to avoid hidden class thrashing.

---
 src/babel/traversal/context.js       |  1 +
 src/babel/traversal/path/index.js    | 17 +++++++++++++++++
 src/babel/traversal/scope/binding.js |  4 ++++
 3 files changed, 22 insertions(+)

diff --git a/src/babel/traversal/context.js b/src/babel/traversal/context.js
index 436b2c8aa1..58bc94d13e 100644
--- a/src/babel/traversal/context.js
+++ b/src/babel/traversal/context.js
@@ -7,6 +7,7 @@ export default class TraversalContext {
     this.scope      = scope;
     this.state      = state;
     this.opts       = opts;
+    this.queue      = null;
   }
 
   shouldVisit(node) {
diff --git a/src/babel/traversal/path/index.js b/src/babel/traversal/path/index.js
index 96b37e1613..be693d8b47 100644
--- a/src/babel/traversal/path/index.js
+++ b/src/babel/traversal/path/index.js
@@ -10,6 +10,23 @@ export default class NodePath {
     this.parent   = parent;
     this.data     = {};
     this.hub      = hub;
+
+    this.shouldSkip         = false;
+    this.shouldStop         = false;
+    this.removed            = false;
+    this.state              = null;
+    this.opts               = null;
+    this.skipKeys           = null;
+    this.parentPath         = null;
+    this.context            = null;
+    this.container          = null;
+    this.containerKey       = null;
+    this.key                = null;
+    this.node               = null;
+    this.scope              = null;
+    this.breakOnScopePaths  = null;
+    this.type               = null;
+    this.typeAnnotation     = null;
   }
 
   /**
diff --git a/src/babel/traversal/scope/binding.js b/src/babel/traversal/scope/binding.js
index 77fc9eb156..efc40358d2 100644
--- a/src/babel/traversal/scope/binding.js
+++ b/src/babel/traversal/scope/binding.js
@@ -11,6 +11,10 @@ export default class Binding {
     this.path  = path;
     this.kind  = kind;
 
+    this.hasValue         = false;
+    this.hasDeoptedValue  = false;
+    this.value            = null;
+
     this.clearValue();
 
     if (existing) {