perf(ivy): store views directly on LContainer

Stores the views that are part of a container directly on the `LContainer`, rather than maintaining a dedicated sub-array.

This PR resolves FW-1288.

packages/core/src/debug/debug_node.ts

@@ -8,10 +8,10 @@
 
 import {Injector} from '../di';
 import {getViewComponent} from '../render3/global_utils_api';
-import {LContainer, NATIVE, VIEWS} from '../render3/interfaces/container';
+import {CONTAINER_HEADER_OFFSET, LContainer, NATIVE} from '../render3/interfaces/container';
 import {TElementNode, TNode, TNodeFlags, TNodeType} from '../render3/interfaces/node';
 import {StylingIndex} from '../render3/interfaces/styling';
-import {LView, NEXT, PARENT, TData, TVIEW, T_HOST} from '../render3/interfaces/view';
+import {LView, PARENT, TData, TVIEW, T_HOST} from '../render3/interfaces/view';
 import {getProp, getValue, isClassBasedValue} from '../render3/styling/class_and_style_bindings';
 import {getStylingContextFromLView} from '../render3/styling/util';
 import {getComponent, getContext, getInjectionTokens, getInjector, getListeners, getLocalRefs, isBrowserEvents, loadLContext, loadLContextFromNode} from '../render3/util/discovery_utils';
@@ -502,8 +502,8 @@ function _queryNodeChildrenR3(
 function _queryNodeChildrenInContainerR3(
     lContainer: LContainer, predicate: Predicate<DebugNode>, matches: DebugNode[],
     elementsOnly: boolean, rootNativeNode: any) {
-  for (let i = 0; i < lContainer[VIEWS].length; i++) {
-    const childView = lContainer[VIEWS][i];
+  for (let i = CONTAINER_HEADER_OFFSET; i < lContainer.length; i++) {
+    const childView = lContainer[i];
     _queryNodeChildrenR3(
         childView[TVIEW].node !, childView, predicate, matches, elementsOnly, rootNativeNode);
   }

packages/core/src/render3/debug.ts

@@ -7,7 +7,8 @@
  */
 
 import {assertDefined} from '../util/assert';
-import {ACTIVE_INDEX, LContainer, NATIVE, VIEWS} from './interfaces/container';
+
+import {ACTIVE_INDEX, CONTAINER_HEADER_OFFSET, LContainer, NATIVE} from './interfaces/container';
 import {COMMENT_MARKER, ELEMENT_MARKER, I18nMutateOpCode, I18nMutateOpCodes, I18nUpdateOpCode, I18nUpdateOpCodes, TIcu} from './interfaces/i18n';
 import {TNode} from './interfaces/node';
 import {LQueries} from './interfaces/query';
@@ -207,7 +208,8 @@ export class LContainerDebug {
 
   get activeIndex(): number { return this._raw_lContainer[ACTIVE_INDEX]; }
   get views(): LViewDebug[] {
-    return this._raw_lContainer[VIEWS].map(toDebug as(l: LView) => LViewDebug);
+    return this._raw_lContainer.slice(CONTAINER_HEADER_OFFSET)
+        .map(toDebug as(l: LView) => LViewDebug);
   }
   get parent(): LViewDebug|LContainerDebug|null { return toDebug(this._raw_lContainer[PARENT]); }
   get queries(): LQueries|null { return this._raw_lContainer[QUERIES]; }

packages/core/src/render3/instructions/container.ts

@@ -9,7 +9,7 @@ import {assertEqual} from '../../util/assert';
 import {assertHasParent} from '../assert';
 import {attachPatchData} from '../context_discovery';
 import {executePreOrderHooks, registerPostOrderHooks} from '../hooks';
-import {ACTIVE_INDEX, VIEWS} from '../interfaces/container';
+import {ACTIVE_INDEX, CONTAINER_HEADER_OFFSET, LContainer} from '../interfaces/container';
 import {ComponentTemplate} from '../interfaces/definition';
 import {LocalRefExtractor, TAttributes, TContainerNode, TNode, TNodeType} from '../interfaces/node';
 import {BINDING_INDEX, HEADER_OFFSET, LView, QUERIES, RENDERER, TVIEW} from '../interfaces/view';
@@ -123,11 +123,11 @@ export function ɵɵcontainerRefreshEnd(): void {
 
   ngDevMode && assertNodeType(previousOrParentTNode, TNodeType.Container);
 
-  const lContainer = getLView()[previousOrParentTNode.index];
+  const lContainer: LContainer = getLView()[previousOrParentTNode.index];
   const nextIndex = lContainer[ACTIVE_INDEX];
 
   // remove extra views at the end of the container
-  while (nextIndex < lContainer[VIEWS].length) {
+  while (nextIndex < lContainer.length - CONTAINER_HEADER_OFFSET) {
     removeView(lContainer, nextIndex);
   }
 }

packages/core/src/render3/instructions/embedded_view.ts

@@ -8,7 +8,7 @@
 
 import {assertDefined, assertEqual} from '../../util/assert';
 import {assertLContainerOrUndefined} from '../assert';
-import {ACTIVE_INDEX, LContainer, VIEWS} from '../interfaces/container';
+import {ACTIVE_INDEX, CONTAINER_HEADER_OFFSET, LContainer} from '../interfaces/container';
 import {RenderFlags} from '../interfaces/definition';
 import {TContainerNode, TNodeType} from '../interfaces/node';
 import {FLAGS, LView, LViewFlags, PARENT, QUERIES, TVIEW, TView, T_HOST} from '../interfaces/view';
@@ -104,17 +104,15 @@ function getOrCreateEmbeddedTView(
  * @param lContainer to search for views
  * @param startIdx starting index in the views array to search from
  * @param viewBlockId exact view block id to look for
- * @returns index of a found view or -1 if not found
  */
 function scanForView(lContainer: LContainer, startIdx: number, viewBlockId: number): LView|null {
-  const views = lContainer[VIEWS];
-  for (let i = startIdx; i < views.length; i++) {
-    const viewAtPositionId = views[i][TVIEW].id;
+  for (let i = startIdx + CONTAINER_HEADER_OFFSET; i < lContainer.length; i++) {
+    const viewAtPositionId = lContainer[i][TVIEW].id;
     if (viewAtPositionId === viewBlockId) {
-      return views[i];
+      return lContainer[i];
     } else if (viewAtPositionId < viewBlockId) {
       // found a view that should not be at this position - remove
-      removeView(lContainer, i);
+      removeView(lContainer, i - CONTAINER_HEADER_OFFSET);
     } else {
       // found a view with id greater than the one we are searching for
       // which means that required view doesn't exist and can't be found at

packages/core/src/render3/instructions/shared.ts

@@ -19,7 +19,7 @@ import {attachLContainerDebug, attachLViewDebug} from '../debug';
 import {diPublicInInjector, getNodeInjectable, getOrCreateNodeInjectorForNode} from '../di';
 import {throwMultipleComponentError} from '../errors';
 import {executeHooks, executePreOrderHooks, registerPreOrderHooks} from '../hooks';
-import {ACTIVE_INDEX, LContainer, VIEWS} from '../interfaces/container';
+import {ACTIVE_INDEX, CONTAINER_HEADER_OFFSET, LContainer} from '../interfaces/container';
 import {ComponentDef, ComponentTemplate, DirectiveDef, DirectiveDefListOrFactory, PipeDefListOrFactory, RenderFlags, ViewQueriesFunction} from '../interfaces/definition';
 import {INJECTOR_BLOOM_PARENT_SIZE, NodeInjectorFactory} from '../interfaces/injector';
 import {AttributeMarker, InitialInputData, InitialInputs, LocalRefExtractor, PropertyAliasValue, PropertyAliases, TAttributes, TContainerNode, TElementContainerNode, TElementNode, TIcuContainerNode, TNode, TNodeFlags, TNodeProviderIndexes, TNodeType, TProjectionNode, TViewNode} from '../interfaces/node';
@@ -37,7 +37,7 @@ import {NO_CHANGE} from '../tokens';
 import {attrsStylingIndexOf} from '../util/attrs_utils';
 import {INTERPOLATION_DELIMITER, stringifyForError} from '../util/misc_utils';
 import {getLViewParent, getRootContext} from '../util/view_traversal_utils';
-import {getComponentViewByIndex, getNativeByIndex, getNativeByTNode, getTNode, isComponent, isComponentDef, isContentQueryHost, isRootView, readPatchedLView, resetPreOrderHookFlags, unwrapRNode, viewAttachedToChangeDetector} from '../util/view_utils';
+import {getComponentViewByIndex, getNativeByIndex, getNativeByTNode, getTNode, isComponent, isComponentDef, isContentQueryHost, isLContainer, isRootView, readPatchedLView, resetPreOrderHookFlags, unwrapRNode, viewAttachedToChangeDetector} from '../util/view_utils';
 
 
 
@@ -1436,7 +1436,6 @@ export function createLContainer(
     null,                            // queries
     tNode,                           // t_host
     native,                          // native
-    [],                              // views
   ];
   ngDevMode && attachLContainerDebug(lContainer);
   return lContainer;
@@ -1452,10 +1451,9 @@ function refreshDynamicEmbeddedViews(lView: LView) {
     // Note: current can be an LView or an LContainer instance, but here we are only interested
     // in LContainer. We can tell it's an LContainer because its length is less than the LView
     // header.
-    if (current.length < HEADER_OFFSET && current[ACTIVE_INDEX] === -1) {
-      const container = current as LContainer;
-      for (let i = 0; i < container[VIEWS].length; i++) {
-        const dynamicViewData = container[VIEWS][i];
+    if (current[ACTIVE_INDEX] === -1 && isLContainer(current)) {
+      for (let i = CONTAINER_HEADER_OFFSET; i < current.length; i++) {
+        const dynamicViewData = current[i];
         // The directives and pipes are not needed here as an existing view is only being refreshed.
         ngDevMode && assertDefined(dynamicViewData[TVIEW], 'TView must be allocated');
         renderEmbeddedTemplate(dynamicViewData, dynamicViewData[TVIEW], dynamicViewData[CONTEXT] !);

packages/core/src/render3/interfaces/container.ts

@@ -28,7 +28,14 @@ export const ACTIVE_INDEX = 2;
 // PARENT, NEXT, QUERIES and T_HOST are indices 3, 4, 5 and 6.
 // As we already have these constants in LView, we don't need to re-create them.
 export const NATIVE = 7;
-export const VIEWS = 8;
+
+/**
+ * Size of LContainer's header. Represents the index after which all views in the
+ * container will be inserted. We need to keep a record of current views so we know
+ * which views are already in the DOM (and don't need to be re-added) and so we can
+ * remove views from the DOM when they are no longer required.
+ */
+export const CONTAINER_HEADER_OFFSET = 8;
 
 /**
  * The state associated with a container.
@@ -92,15 +99,6 @@ export interface LContainer extends Array<any> {
   /** The comment element that serves as an anchor for this LContainer. */
   readonly[NATIVE]:
       RComment;  // TODO(misko): remove as this value can be gotten by unwrapping `[HOST]`
-
-  /**
-*A list of the container's currently active child views. Views will be inserted
-*here as they are added and spliced from here when they are removed. We need
-*to keep a record of current views so we know which views are already in the DOM
-*(and don't need to be re-added) and so we can remove views from the DOM when they
-*are no longer required.
-*/
-  [VIEWS]: LView[];
 }
 
 // Note: This hack is necessary so we don't erroneously get a circular dependency

packages/core/src/render3/node_manipulation.ts

@@ -7,11 +7,10 @@
  */
 
 import {ViewEncapsulation} from '../metadata/view';
-import {assertDefined} from '../util/assert';
 
 import {assertLContainer, assertLView} from './assert';
 import {attachPatchData} from './context_discovery';
-import {LContainer, NATIVE, VIEWS, unusedValueExportToPlacateAjd as unused1} from './interfaces/container';
+import {CONTAINER_HEADER_OFFSET, LContainer, NATIVE, unusedValueExportToPlacateAjd as unused1} from './interfaces/container';
 import {ComponentDef} from './interfaces/definition';
 import {NodeInjectorFactory} from './interfaces/injector';
 import {TElementNode, TNode, TNodeFlags, TNodeType, TProjectionNode, TViewNode, unusedValueExportToPlacateAjd as unused2} from './interfaces/node';
@@ -99,8 +98,9 @@ function walkTNodeTree(
         // This element has an LContainer, and its comment needs to be handled
         executeNodeAction(
             action, renderer, renderParent, nodeOrContainer[NATIVE], tNode, beforeNode);
-        if (nodeOrContainer[VIEWS].length) {
-          currentView = nodeOrContainer[VIEWS][0];
+        const firstView = nodeOrContainer[CONTAINER_HEADER_OFFSET];
+        if (firstView) {
+          currentView = firstView;
           nextTNode = currentView[TVIEW].node;
 
           // When the walker enters a container, then the beforeNode has to become the local native
@@ -111,9 +111,9 @@ function walkTNodeTree(
     } else if (tNode.type === TNodeType.Container) {
       const lContainer = currentView ![tNode.index] as LContainer;
       executeNodeAction(action, renderer, renderParent, lContainer[NATIVE], tNode, beforeNode);
-
-      if (lContainer[VIEWS].length) {
-        currentView = lContainer[VIEWS][0];
+      const firstView = lContainer[CONTAINER_HEADER_OFFSET];
+      if (firstView) {
+        currentView = firstView;
         nextTNode = currentView[TVIEW].node;
 
         // When the walker enters a container, then the beforeNode has to become the local native
@@ -302,8 +302,8 @@ export function destroyViewTree(rootView: LView): void {
     } else {
       ngDevMode && assertLContainer(lViewOrLContainer);
       // If container, traverse down to its first LView.
-      const views = lViewOrLContainer[VIEWS] as LView[];
-      if (views.length > 0) next = views[0];
+      const firstView: LView|undefined = lViewOrLContainer[CONTAINER_HEADER_OFFSET];
+      if (firstView) next = firstView;
     }
 
     if (!next) {
@@ -335,18 +335,18 @@ export function destroyViewTree(rootView: LView): void {
 export function insertView(lView: LView, lContainer: LContainer, index: number) {
   ngDevMode && assertLView(lView);
   ngDevMode && assertLContainer(lContainer);
-  const views = lContainer[VIEWS];
-  ngDevMode && assertDefined(views, 'Container must have views');
+  const indexInContainer = CONTAINER_HEADER_OFFSET + index;
+  const containerLength = lContainer.length;
+
   if (index > 0) {
     // This is a new view, we need to add it to the children.
-    views[index - 1][NEXT] = lView;
+    lContainer[indexInContainer - 1][NEXT] = lView;
   }
-
-  if (index < views.length) {
-    lView[NEXT] = views[index];
-    views.splice(index, 0, lView);
+  if (index < containerLength - CONTAINER_HEADER_OFFSET) {
+    lView[NEXT] = lContainer[indexInContainer];
+    lContainer.splice(CONTAINER_HEADER_OFFSET + index, 0, lView);
   } else {
-    views.push(lView);
+    lContainer.push(lView);
     lView[NEXT] = null;
   }
 
@@ -372,13 +372,15 @@ export function insertView(lView: LView, lContainer: LContainer, index: number)
  * @returns Detached LView instance.
  */
 export function detachView(lContainer: LContainer, removeIndex: number): LView|undefined {
-  const views = lContainer[VIEWS];
-  const viewToDetach = views[removeIndex];
+  if (lContainer.length <= CONTAINER_HEADER_OFFSET) return;
+
+  const indexInContainer = CONTAINER_HEADER_OFFSET + removeIndex;
+  const viewToDetach = lContainer[indexInContainer];
   if (viewToDetach) {
     if (removeIndex > 0) {
-      views[removeIndex - 1][NEXT] = viewToDetach[NEXT] as LView;
+      lContainer[indexInContainer - 1][NEXT] = viewToDetach[NEXT] as LView;
     }
-    views.splice(removeIndex, 1);
+    lContainer.splice(CONTAINER_HEADER_OFFSET + removeIndex, 1);
     addRemoveViewFromContainer(viewToDetach, false);
 
     if ((viewToDetach[FLAGS] & LViewFlags.Attached) &&
@@ -400,11 +402,8 @@ export function detachView(lContainer: LContainer, removeIndex: number): LView|u
  * @param removeIndex The index of the view to remove
  */
 export function removeView(lContainer: LContainer, removeIndex: number) {
-  const view = lContainer[VIEWS][removeIndex];
-  if (view) {
-    detachView(lContainer, removeIndex);
-    destroyLView(view);
-  }
+  const detachedView = detachView(lContainer, removeIndex);
+  detachedView && destroyLView(detachedView);
 }
 
 /**
@@ -678,9 +677,8 @@ export function nativeNextSibling(renderer: Renderer3, node: RNode): RNode|null
 function getNativeAnchorNode(parentTNode: TNode, lView: LView): RNode|null {
   if (parentTNode.type === TNodeType.View) {
     const lContainer = getLContainer(parentTNode as TViewNode, lView) !;
-    const views = lContainer[VIEWS];
-    const index = views.indexOf(lView);
-    return getBeforeNodeForView(index, views, lContainer[NATIVE]);
+    const index = lContainer.indexOf(lView, CONTAINER_HEADER_OFFSET) - CONTAINER_HEADER_OFFSET;
+    return getBeforeNodeForView(index, lContainer);
   } else if (
       parentTNode.type === TNodeType.ElementContainer ||
       parentTNode.type === TNodeType.IcuContainer) {
@@ -729,9 +727,11 @@ function getHighestElementOrICUContainer(tNode: TNode): TNode {
   return tNode;
 }
 
-export function getBeforeNodeForView(index: number, views: LView[], containerNative: RComment) {
-  if (index + 1 < views.length) {
-    const view = views[index + 1] as LView;
+export function getBeforeNodeForView(index: number, lContainer: LContainer) {
+  const containerNative = lContainer[NATIVE];
+
+  if (index + 1 < lContainer.length - CONTAINER_HEADER_OFFSET) {
+    const view = lContainer[CONTAINER_HEADER_OFFSET + index + 1] as LView;
     const viewTNode = view[T_HOST] as TViewNode;
     return viewTNode.child ? getNativeByTNode(viewTNode.child, view) : containerNative;
   } else {
@@ -817,9 +817,8 @@ function appendProjectedNode(
     // Alternatively a container is projected at the root of a component's template
     // and can't be re-projected (as not content of any component).
     // Assign the final projection location in those cases.
-    const views = nodeOrContainer[VIEWS];
-    for (let i = 0; i < views.length; i++) {
-      addRemoveViewFromContainer(views[i], true, nodeOrContainer[NATIVE]);
+    for (let i = CONTAINER_HEADER_OFFSET; i < nodeOrContainer.length; i++) {
+      addRemoveViewFromContainer(nodeOrContainer[i], true, nodeOrContainer[NATIVE]);
     }
   } else {
     if (projectedTNode.type === TNodeType.ElementContainer) {

packages/core/src/render3/view_engine_compatibility.ts

@@ -19,7 +19,7 @@ import {assertDefined, assertGreaterThan, assertLessThan} from '../util/assert';
 
 import {NodeInjector, getParentInjectorLocation} from './di';
 import {addToViewTree, createEmbeddedViewAndNode, createLContainer, renderEmbeddedTemplate} from './instructions/shared';
-import {ACTIVE_INDEX, LContainer, NATIVE, VIEWS} from './interfaces/container';
+import {ACTIVE_INDEX, CONTAINER_HEADER_OFFSET, LContainer, NATIVE} from './interfaces/container';
 import {TContainerNode, TElementContainerNode, TElementNode, TNode, TNodeType, TViewNode} from './interfaces/node';
 import {RComment, RElement, isProceduralRenderer} from './interfaces/renderer';
 import {CONTEXT, LView, QUERIES, RENDERER, TView, T_HOST} from './interfaces/view';
@@ -201,14 +201,19 @@ export function createContainerRef(
       }
 
       clear(): void {
-        while (this._lContainer[VIEWS].length) {
+        while (this._lContainer.length - CONTAINER_HEADER_OFFSET > 0) {
           this.remove(0);
         }
       }
 
       get(index: number): viewEngine_ViewRef|null { return this._viewRefs[index] || null; }
 
-      get length(): number { return this._lContainer[VIEWS].length; }
+      get length(): number {
+        // Note that if there are no views, the container
+        // length will be smaller than the header offset.
+        const viewAmount = this._lContainer.length - CONTAINER_HEADER_OFFSET;
+        return viewAmount > 0 ? viewAmount : 0;
+      }
 
       createEmbeddedView<C>(templateRef: ViewEngine_TemplateRef<C>, context?: C, index?: number):
           viewEngine_EmbeddedViewRef<C> {
@@ -250,8 +255,7 @@ export function createContainerRef(
 
         insertView(lView, this._lContainer, adjustedIdx);
 
-        const beforeNode =
-            getBeforeNodeForView(adjustedIdx, this._lContainer[VIEWS], this._lContainer[NATIVE]);
+        const beforeNode = getBeforeNodeForView(adjustedIdx, this._lContainer);
         addRemoveViewFromContainer(lView, true, beforeNode);
 
         (viewRef as ViewRef<any>).attachToViewContainerRef(this);
@@ -287,12 +291,12 @@ export function createContainerRef(
 
       private _adjustIndex(index?: number, shift: number = 0) {
         if (index == null) {
-          return this._lContainer[VIEWS].length + shift;
+          return this.length + shift;
         }
         if (ngDevMode) {
           assertGreaterThan(index, -1, 'index must be positive');
           // +1 because it's legal to insert at the end.
-          assertLessThan(index, this._lContainer[VIEWS].length + 1 + shift, 'index');
+          assertLessThan(index, this.length + 1 + shift, 'index');
         }
         return index;
       }

packages/core/test/bundling/cyclic_import/bundle.golden_symbols.json

@@ -20,6 +20,9 @@
   {
     "name": "CLEAN_PROMISE"
   },
+  {
+    "name": "CONTAINER_HEADER_OFFSET"
+  },
   {
     "name": "CONTEXT"
   },
@@ -143,9 +146,6 @@
   {
     "name": "UnsubscriptionErrorImpl"
   },
-  {
-    "name": "VIEWS"
-  },
   {
     "name": "ViewEncapsulation"
   },