Optimized WebGLBindingStates, WebGLShadowMap and WebGLTextures.

src/renderers/webgl/WebGLBindingStates.js

@@ -4,7 +4,7 @@ function WebGLBindingStates( gl, attributes ) {
 
 	const maxVertexAttributes = gl.getParameter( gl.MAX_VERTEX_ATTRIBS );
 
-	const bindingStates = {};
+	const bindingStates = new Map();
 
 	const defaultState = createBindingState( null );
 	let currentState = defaultState;
@@ -71,30 +71,30 @@ function WebGLBindingStates( gl, attributes ) {
 
 		const wireframe = ( material.wireframe === true );
 
-		let programMap = bindingStates[ geometry.id ];
+		let programMap = bindingStates.get( geometry.id );
 
 		if ( programMap === undefined ) {
 
-			programMap = {};
-			bindingStates[ geometry.id ] = programMap;
+			programMap = new Map();
+			bindingStates.set( geometry.id, programMap );
 
 		}
 
-		let stateMap = programMap[ program.id ];
+		let stateMap = programMap.get( program.id );
 
 		if ( stateMap === undefined ) {
 
-			stateMap = {};
-			programMap[ program.id ] = stateMap;
+			stateMap = new Map();
+			programMap.set( program.id, stateMap );
 
 		}
 
-		let state = stateMap[ wireframe ];
+		let state = stateMap.get( wireframe );
 
 		if ( state === undefined ) {
 
 			state = createBindingState( createVertexArrayObject() );
-			stateMap[ wireframe ] = state;
+			stateMap.set( wireframe, state );
 
 		}
 
@@ -475,77 +475,59 @@ function WebGLBindingStates( gl, attributes ) {
 
 		reset();
 
-		for ( const geometryId in bindingStates ) {
+		for ( const programMap of bindingStates.values() ) {
 
-			const programMap = bindingStates[ geometryId ];
+			for ( const stateMap of programMap.values() ) {
 
-			for ( const programId in programMap ) {
+				for ( const state of stateMap.values() ) {
 
-				const stateMap = programMap[ programId ];
-
-				for ( const wireframe in stateMap ) {
-
-					deleteVertexArrayObject( stateMap[ wireframe ].object );
-
-					delete stateMap[ wireframe ];
+					deleteVertexArrayObject( state.object );
 
 				}
 
-				delete programMap[ programId ];
-
 			}
 
-			delete bindingStates[ geometryId ];
-
 		}
 
+		bindingStates.clear();
+
 	}
 
 	function releaseStatesOfGeometry( geometry ) {
 
-		if ( bindingStates[ geometry.id ] === undefined ) return;
+		if ( bindingStates.get( geometry.id ) === undefined ) return;
 
-		const programMap = bindingStates[ geometry.id ];
+		const programMap = bindingStates.get( geometry.id );
 
-		for ( const programId in programMap ) {
+		for ( const stateMap of programMap.values() ) {
 
-			const stateMap = programMap[ programId ];
+			for ( const state of stateMap.values() ) {
 
-			for ( const wireframe in stateMap ) {
-
-				deleteVertexArrayObject( stateMap[ wireframe ].object );
-
-				delete stateMap[ wireframe ];
+				deleteVertexArrayObject( state.object );
 
 			}
 
-			delete programMap[ programId ];
-
 		}
 
-		delete bindingStates[ geometry.id ];
+		bindingStates.delete( geometry.id );
 
 	}
 
 	function releaseStatesOfProgram( program ) {
 
-		for ( const geometryId in bindingStates ) {
-
-			const programMap = bindingStates[ geometryId ];
-
-			if ( programMap[ program.id ] === undefined ) continue;
+		for ( const programMap of bindingStates.values() ) {
 
-			const stateMap = programMap[ program.id ];
+			if ( programMap.get( program.id ) === undefined ) continue;
 
-			for ( const wireframe in stateMap ) {
+			const stateMap = programMap.get( program.id );
 
-				deleteVertexArrayObject( stateMap[ wireframe ].object );
+			for ( const state of stateMap.values() ) {
 
-				delete stateMap[ wireframe ];
+				deleteVertexArrayObject( state.object );
 
 			}
 
-			delete programMap[ program.id ];
+			programMap.delete( program.id );
 
 		}
 

src/renderers/webgl/WebGLShadowMap.js

@@ -29,7 +29,7 @@ function WebGLShadowMap( renderer, objects, capabilities ) {
 		_depthMaterialVSM = new MeshDepthMaterial( { depthPacking: IdentityDepthPacking } ),
 		_distanceMaterial = new MeshDistanceMaterial(),
 
-		_materialCache = {},
+		_materialCache = new Map(),
 
 		_maxTextureSize = capabilities.maxTextureSize;
 
@@ -392,21 +392,21 @@ function WebGLShadowMap( renderer, objects, capabilities ) {
 
 				const keyA = result.uuid, keyB = material.uuid;
 
-				let materialsForVariant = _materialCache[ keyA ];
+				let materialsForVariant = _materialCache.get( keyA );
 
 				if ( materialsForVariant === undefined ) {
 
-					materialsForVariant = {};
-					_materialCache[ keyA ] = materialsForVariant;
+					materialsForVariant = new Map();
+					_materialCache.set( keyA, materialsForVariant );
 
 				}
 
-				let cachedMaterial = materialsForVariant[ keyB ];
+				let cachedMaterial = materialsForVariant.get( keyB );
 
 				if ( cachedMaterial === undefined ) {
 
 					cachedMaterial = result.clone();
-					materialsForVariant[ keyB ] = cachedMaterial;
+					materialsForVariant.set( keyB, cachedMaterial );
 					material.addEventListener( 'dispose', onMaterialDispose );
 
 				}
@@ -528,17 +528,15 @@ function WebGLShadowMap( renderer, objects, capabilities ) {
 
 		// make sure to remove the unique distance/depth materials used for shadow map rendering
 
-		for ( const id in _materialCache ) {
-
-			const cache = _materialCache[ id ];
+		for ( const cache of _materialCache.values() ) {
 
 			const uuid = event.target.uuid;
 
-			if ( uuid in cache ) {
+			if ( cache.has( uuid ) ) {
 
-				const shadowMaterial = cache[ uuid ];
+				const shadowMaterial = cache.get( uuid );
 				shadowMaterial.dispose();
-				delete cache[ uuid ];
+				cache.delete( uuid );
 
 			}
 

src/renderers/webgl/WebGLTextures.js

@@ -1776,8 +1776,8 @@ function WebGLTextures( _gl, extensions, state, properties, capabilities, utils,
 
 				const disposeEvent = () => {
 
-					delete renderTargetProperties.__boundDepthTexture;
-					delete renderTargetProperties.__depthDisposeCallback;
+					renderTargetProperties.__boundDepthTexture = undefined;
+					renderTargetProperties.__depthDisposeCallback = undefined;
 					depthTexture.removeEventListener( 'dispose', disposeEvent );
 
 				};