Core: Eagerly instantiate module scope variables.

src/animation/PropertyBinding.js

@@ -10,9 +10,39 @@
 
 // Characters [].:/ are reserved for track binding syntax.
 var _RESERVED_CHARS_RE = '\\[\\]\\.:\\/';
+var _reservedRe = new RegExp( '[' + _RESERVED_CHARS_RE + ']', 'g' );
 
-var _reservedRe;
-var _trackRe, _supportedObjectNames;
+// Attempts to allow node names from any language. ES5's `\w` regexp matches
+// only latin characters, and the unicode \p{L} is not yet supported. So
+// instead, we exclude reserved characters and match everything else.
+var _wordChar = '[^' + _RESERVED_CHARS_RE + ']';
+var _wordCharOrDot = '[^' + _RESERVED_CHARS_RE.replace( '\\.', '' ) + ']';
+
+// Parent directories, delimited by '/' or ':'. Currently unused, but must
+// be matched to parse the rest of the track name.
+var _directoryRe = /((?:WC+[\/:])*)/.source.replace( 'WC', _wordChar );
+
+// Target node. May contain word characters (a-zA-Z0-9_) and '.' or '-'.
+var _nodeRe = /(WCOD+)?/.source.replace( 'WCOD', _wordCharOrDot );
+
+// Object on target node, and accessor. May not contain reserved
+// characters. Accessor may contain any character except closing bracket.
+var _objectRe = /(?:\.(WC+)(?:\[(.+)\])?)?/.source.replace( 'WC', _wordChar );
+
+// Property and accessor. May not contain reserved characters. Accessor may
+// contain any non-bracket characters.
+var _propertyRe = /\.(WC+)(?:\[(.+)\])?/.source.replace( 'WC', _wordChar );
+
+var _trackRe = new RegExp( ''
+	+ '^'
+	+ _directoryRe
+	+ _nodeRe
+	+ _objectRe
+	+ _propertyRe
+	+ '$'
+);
+
+var _supportedObjectNames = [ 'material', 'materials', 'bones' ];
 
 function Composite( targetGroup, path, optionalParsedPath ) {
 
@@ -114,54 +144,12 @@ Object.assign( PropertyBinding, {
 	 */
 	sanitizeNodeName: function ( name ) {
 
-		if ( _reservedRe === undefined ) {
-
-			_reservedRe = new RegExp( '[' + _RESERVED_CHARS_RE + ']', 'g' );
-
-		}
-
 		return name.replace( /\s/g, '_' ).replace( _reservedRe, '' );
 
 	},
 
 	parseTrackName: function ( trackName ) {
 
-		if ( _supportedObjectNames === undefined ) {
-
-			// Attempts to allow node names from any language. ES5's `\w` regexp matches
-			// only latin characters, and the unicode \p{L} is not yet supported. So
-			// instead, we exclude reserved characters and match everything else.
-			var wordChar = '[^' + _RESERVED_CHARS_RE + ']';
-			var wordCharOrDot = '[^' + _RESERVED_CHARS_RE.replace( '\\.', '' ) + ']';
-
-			// Parent directories, delimited by '/' or ':'. Currently unused, but must
-			// be matched to parse the rest of the track name.
-			var directoryRe = /((?:WC+[\/:])*)/.source.replace( 'WC', wordChar );
-
-			// Target node. May contain word characters (a-zA-Z0-9_) and '.' or '-'.
-			var nodeRe = /(WCOD+)?/.source.replace( 'WCOD', wordCharOrDot );
-
-			// Object on target node, and accessor. May not contain reserved
-			// characters. Accessor may contain any character except closing bracket.
-			var objectRe = /(?:\.(WC+)(?:\[(.+)\])?)?/.source.replace( 'WC', wordChar );
-
-			// Property and accessor. May not contain reserved characters. Accessor may
-			// contain any non-bracket characters.
-			var propertyRe = /\.(WC+)(?:\[(.+)\])?/.source.replace( 'WC', wordChar );
-
-			_trackRe = new RegExp( ''
-				+ '^'
-				+ directoryRe
-				+ nodeRe
-				+ objectRe
-				+ propertyRe
-				+ '$'
-			);
-
-			_supportedObjectNames = [ 'material', 'materials', 'bones' ];
-
-		}
-
 		var matches = _trackRe.exec( trackName );
 
 		if ( ! matches ) {

src/audio/AudioListener.js

@@ -8,8 +8,10 @@ import { Clock } from '../core/Clock.js';
 import { Object3D } from '../core/Object3D.js';
 import { AudioContext } from './AudioContext.js';
 
-var _position, _quaternion, _scale;
-var _orientation;
+var _position = new Vector3();
+var _quaternion = new Quaternion();
+var _scale = new Vector3();
+var _orientation = new Vector3();
 
 function AudioListener() {
 
@@ -102,15 +104,6 @@ AudioListener.prototype = Object.assign( Object.create( Object3D.prototype ), {
 
 		Object3D.prototype.updateMatrixWorld.call( this, force );
 
-		if ( _position === undefined ) {
-
-			_position = new Vector3();
-			_quaternion = new Quaternion();
-			_scale = new Vector3();
-			_orientation = new Vector3();
-
-		}
-
 		var listener = this.context.listener;
 		var up = this.up;
 

src/audio/PositionalAudio.js

@@ -7,8 +7,10 @@ import { Quaternion } from '../math/Quaternion.js';
 import { Audio } from './Audio.js';
 import { Object3D } from '../core/Object3D.js';
 
-var _position, _quaternion, _scale;
-var _orientation;
+var _position = new Vector3();
+var _quaternion = new Quaternion();
+var _scale = new Vector3();
+var _orientation = new Vector3();
 
 function PositionalAudio( listener ) {
 
@@ -100,15 +102,6 @@ PositionalAudio.prototype = Object.assign( Object.create( Audio.prototype ), {
 
 		Object3D.prototype.updateMatrixWorld.call( this, force );
 
-		if ( _position === undefined ) {
-
-			_position = new Vector3();
-			_quaternion = new Quaternion();
-			_scale = new Vector3();
-			_orientation = new Vector3();
-
-		}
-
 		if ( this.hasPlaybackControl === true && this.isPlaying === false ) return;
 
 		this.matrixWorld.decompose( _position, _quaternion, _scale );

src/cameras/StereoCamera.js

@@ -2,7 +2,8 @@ import { Matrix4 } from '../math/Matrix4.js';
 import { _Math } from '../math/Math.js';
 import { PerspectiveCamera } from './PerspectiveCamera.js';
 
-var _eyeRight, _eyeLeft;
+var _eyeRight = new Matrix4();
+var _eyeLeft = new Matrix4();
 
 /**
  * @author mrdoob / http://mrdoob.com/
@@ -40,13 +41,6 @@ Object.assign( StereoCamera.prototype, {
 
 	update: function ( camera ) {
 
-		if ( _eyeRight === undefined ) {
-
-			_eyeRight = new Matrix4();
-			_eyeLeft = new Matrix4();
-
-		}
-
 		var cache = this._cache;
 
 		var needsUpdate = cache.focus !== camera.focus || cache.fov !== camera.fov ||

src/core/BufferGeometry.js

@@ -16,9 +16,13 @@ import { arrayMax } from '../utils.js';
  */
 
 var _bufferGeometryId = 1; // BufferGeometry uses odd numbers as Id
-var _m1, _obj, _offset;
-var _box, _boxMorphTargets;
-var _vector;
+
+var _m1 = new Matrix4();
+var _obj = new Object3D();
+var _offset = new Vector3();
+var _box = new Box3();
+var _boxMorphTargets = new Box3();
+var _vector = new Vector3();
 
 function BufferGeometry() {
 
@@ -189,8 +193,6 @@ BufferGeometry.prototype = Object.assign( Object.create( EventDispatcher.prototy
 
 		// rotate geometry around world x-axis
 
-		if ( _m1 === undefined ) _m1 = new Matrix4();
-
 		_m1.makeRotationX( angle );
 
 		this.applyMatrix( _m1 );
@@ -203,8 +205,6 @@ BufferGeometry.prototype = Object.assign( Object.create( EventDispatcher.prototy
 
 		// rotate geometry around world y-axis
 
-		if ( _m1 === undefined ) _m1 = new Matrix4();
-
 		_m1.makeRotationY( angle );
 
 		this.applyMatrix( _m1 );
@@ -217,8 +217,6 @@ BufferGeometry.prototype = Object.assign( Object.create( EventDispatcher.prototy
 
 		// rotate geometry around world z-axis
 
-		if ( _m1 === undefined ) _m1 = new Matrix4();
-
 		_m1.makeRotationZ( angle );
 
 		this.applyMatrix( _m1 );
@@ -231,8 +229,6 @@ BufferGeometry.prototype = Object.assign( Object.create( EventDispatcher.prototy
 
 		// translate geometry
 
-		if ( _m1 === undefined ) _m1 = new Matrix4();
-
 		_m1.makeTranslation( x, y, z );
 
 		this.applyMatrix( _m1 );
@@ -245,8 +241,6 @@ BufferGeometry.prototype = Object.assign( Object.create( EventDispatcher.prototy
 
 		// scale geometry
 
-		if ( _m1 === undefined ) _m1 = new Matrix4();
-
 		_m1.makeScale( x, y, z );
 
 		this.applyMatrix( _m1 );
@@ -257,8 +251,6 @@ BufferGeometry.prototype = Object.assign( Object.create( EventDispatcher.prototy
 
 	lookAt: function ( vector ) {
 
-		if ( _obj === undefined ) _obj = new Object3D();
-
 		_obj.lookAt( vector );
 
 		_obj.updateMatrix();
@@ -271,8 +263,6 @@ BufferGeometry.prototype = Object.assign( Object.create( EventDispatcher.prototy
 
 	center: function () {
 
-		if ( _offset === undefined ) _offset = new Vector3();
-
 		this.computeBoundingBox();
 
 		this.boundingBox.getCenter( _offset ).negate();
@@ -578,12 +568,6 @@ BufferGeometry.prototype = Object.assign( Object.create( EventDispatcher.prototy
 
 	computeBoundingBox: function () {
 
-		if ( _box === undefined ) {
-
-			_box = new Box3();
-
-		}
-
 		if ( this.boundingBox === null ) {
 
 			this.boundingBox = new Box3();
@@ -629,14 +613,6 @@ BufferGeometry.prototype = Object.assign( Object.create( EventDispatcher.prototy
 
 	computeBoundingSphere: function () {
 
-		if ( _boxMorphTargets === undefined ) {
-
-			_box = new Box3();
-			_vector = new Vector3();
-			_boxMorphTargets = new Box3();
-
-		}
-
 		if ( this.boundingSphere === null ) {
 
 			this.boundingSphere = new Sphere();
@@ -877,8 +853,6 @@ BufferGeometry.prototype = Object.assign( Object.create( EventDispatcher.prototy
 
 	normalizeNormals: function () {
 
-		if ( _vector === undefined ) _vector = new Vector3();
-
 		var normals = this.attributes.normal;
 
 		for ( var i = 0, il = normals.count; i < il; i ++ ) {

src/core/Geometry.js

@@ -20,7 +20,9 @@ import { _Math } from '../math/Math.js';
  */
 
 var _geometryId = 0; // Geometry uses even numbers as Id
-var _m1, _obj, _offset;
+var _m1 = new Matrix4();
+var _obj = new Object3D();
+var _offset = new Vector3();
 
 function Geometry() {
 
@@ -112,8 +114,6 @@ Geometry.prototype = Object.assign( Object.create( EventDispatcher.prototype ),
 
 		// rotate geometry around world x-axis
 
-		if ( _m1 === undefined ) _m1 = new Matrix4();
-
 		_m1.makeRotationX( angle );
 
 		this.applyMatrix( _m1 );
@@ -126,8 +126,6 @@ Geometry.prototype = Object.assign( Object.create( EventDispatcher.prototype ),
 
 		// rotate geometry around world y-axis
 
-		if ( _m1 === undefined ) _m1 = new Matrix4();
-
 		_m1.makeRotationY( angle );
 
 		this.applyMatrix( _m1 );
@@ -140,8 +138,6 @@ Geometry.prototype = Object.assign( Object.create( EventDispatcher.prototype ),
 
 		// rotate geometry around world z-axis
 
-		if ( _m1 === undefined ) _m1 = new Matrix4();
-
 		_m1.makeRotationZ( angle );
 
 		this.applyMatrix( _m1 );
@@ -154,8 +150,6 @@ Geometry.prototype = Object.assign( Object.create( EventDispatcher.prototype ),
 
 		// translate geometry
 
-		if ( _m1 === undefined ) _m1 = new Matrix4();
-
 		_m1.makeTranslation( x, y, z );
 
 		this.applyMatrix( _m1 );
@@ -168,8 +162,6 @@ Geometry.prototype = Object.assign( Object.create( EventDispatcher.prototype ),
 
 		// scale geometry
 
-		if ( _m1 === undefined ) _m1 = new Matrix4();
-
 		_m1.makeScale( x, y, z );
 
 		this.applyMatrix( _m1 );
@@ -180,8 +172,6 @@ Geometry.prototype = Object.assign( Object.create( EventDispatcher.prototype ),
 
 	lookAt: function ( vector ) {
 
-		if ( _obj === undefined ) _obj = new Object3D();
-
 		_obj.lookAt( vector );
 
 		_obj.updateMatrix();
@@ -327,8 +317,6 @@ Geometry.prototype = Object.assign( Object.create( EventDispatcher.prototype ),
 
 	center: function () {
 
-		if ( _offset === undefined ) _offset = new Vector3();
-
 		this.computeBoundingBox();
 
 		this.boundingBox.getCenter( _offset ).negate();