perf: don't create holey arrays (#32155)

Don't use `Array` constructor with the size value (ex. `new Array(5)`) - this will create a `HOLEY_ELEMENTS` array (even if this array is filled in later on!);

https://v8.dev/blog/elements-kinds
https://stackoverflow.com/questions/32054170/how-to-resize-an-array

PR Close #32155

modules/benchmarks/src/largetable/baseline/table.ts

@@ -50,12 +50,12 @@ export class TableComponent {
     this._rootEl.appendChild(table);
     const tbody = document.createElement('tbody');
     table.appendChild(tbody);
-    this._renderCells = new Array(data.length);
+    this._renderCells = [];
     for (let r = 0; r < data.length; r++) {
       const dataRow = data[r];
       const tr = document.createElement('tr');
       tbody.appendChild(tr);
-      const renderRow = new Array(dataRow.length);
+      const renderRow = [];
       this._renderCells[r] = renderRow;
       for (let c = 0; c < dataRow.length; c++) {
         const dataCell = dataRow[c];

modules/benchmarks/src/old/compiler/compiler_benchmark.ts

@@ -75,7 +75,7 @@ class MultiplyDirectiveResolver extends DirectiveResolver {
 
   private _fillCache(component: Type) {
     const view = super.resolve(component);
-    const multipliedTemplates = new Array(this._multiplyBy);
+    const multipliedTemplates = [];
     for (let i = 0; i < this._multiplyBy; ++i) {
       multipliedTemplates[i] = view.template;
     }

modules/benchmarks/src/old/costs/index.ts

@@ -18,7 +18,7 @@ let testList = null;
 
 export function main() {
   const size = getIntParameter('size');
-  testList = new Array(size);
+  testList = [];
 
   platformBrowserDynamic().bootstrapModule(AppModule).then((ref) => {
     const injector = ref.injector;

modules/benchmarks/src/tree/baseline/tree.ts

@@ -6,7 +6,7 @@
  * found in the LICENSE file at https://angular.io/license
  */
 
-import {TreeNode} from '../util';
+import {TreeNode, newArray} from '../util';
 
 export class TreeComponent {
   private _renderNodes: any[];
@@ -25,7 +25,7 @@ export class TreeComponent {
 
   private _create(parentNode: any, dataNode: TreeNode, index: number) {
     if (!this._renderNodes) {
-      this._renderNodes = new Array(dataNode.transitiveChildCount);
+      this._renderNodes = newArray(dataNode.transitiveChildCount);
     }
 
     const span = document.createElement('span');

modules/benchmarks/src/tree/util.ts

@@ -68,3 +68,13 @@ export function flattenTree(node: TreeNode, target: TreeNode[] = []): TreeNode[]
   }
   return target;
 }
+
+export function newArray<T = any>(size: number): T[];
+export function newArray<T>(size: number, value: T): T[];
+export function newArray<T>(size: number, value?: T): T[] {
+  const list: T[] = [];
+  for (let i = 0; i < size; i++) {
+    list.push(value !);
+  }
+  return list;
+}

packages/bazel/src/ng_package/packager.ts

@@ -335,7 +335,7 @@ function main(args: string[]): number {
     const parts = packageName.split('/');
     // Remove the scoped package part, like @angular if present
     const nameParts = packageName.startsWith('@') ? parts.splice(1) : parts;
-    const relativePath = Array(nameParts.length - 1).fill('..').join('/') || '.';
+    const relativePath = newArray(nameParts.length - 1, '..').join('/') || '.';
     let basename: string;
     if (dir === 'bundles') {
       basename = nameParts.join('-') + '.umd';
@@ -435,3 +435,13 @@ export * from '${srcDirRelative(inputPath, typingsFile.replace(/\.d\.tsx?$/, '')
 if (require.main === module) {
   process.exitCode = main(process.argv.slice(2));
 }
+
+export function newArray<T = any>(size: number): T[];
+export function newArray<T>(size: number, value: T): T[];
+export function newArray<T>(size: number, value?: T): T[] {
+  const list: T[] = [];
+  for (let i = 0; i < size; i++) {
+    list.push(value !);
+  }
+  return list;
+}

packages/compiler/src/aot/compiler.ts

@@ -14,7 +14,6 @@ import {MessageBundle} from '../i18n/message_bundle';
 import {Identifiers, createTokenForExternalReference} from '../identifiers';
 import {InjectableCompiler} from '../injectable_compiler';
 import {CompileMetadataResolver} from '../metadata_resolver';
-import * as html from '../ml_parser/ast';
 import {HtmlParser} from '../ml_parser/html_parser';
 import {removeWhitespaces} from '../ml_parser/html_whitespaces';
 import {DEFAULT_INTERPOLATION_CONFIG, InterpolationConfig} from '../ml_parser/interpolation_config';
@@ -32,7 +31,7 @@ import {SummaryResolver} from '../summary_resolver';
 import {BindingParser} from '../template_parser/binding_parser';
 import {TemplateAst} from '../template_parser/template_ast';
 import {TemplateParser} from '../template_parser/template_parser';
-import {OutputContext, ValueVisitor, error, syntaxError, visitValue} from '../util';
+import {OutputContext, ValueVisitor, error, newArray, syntaxError, visitValue} from '../util';
 import {TypeCheckCompiler} from '../view_compiler/type_check_compiler';
 import {ViewCompileResult, ViewCompiler} from '../view_compiler/view_compiler';
 
@@ -690,7 +689,7 @@ export class AotCompiler {
           const suppliedTypeParams = typeParams || [];
           const missingTypeParamsCount = arity - suppliedTypeParams.length;
           const allTypeParams =
-              suppliedTypeParams.concat(new Array(missingTypeParamsCount).fill(o.DYNAMIC_TYPE));
+              suppliedTypeParams.concat(newArray(missingTypeParamsCount, o.DYNAMIC_TYPE));
           return members.reduce(
               (expr, memberName) => expr.prop(memberName),
               <o.Expression>o.importExpr(

packages/compiler/src/expression_parser/ast.ts

@@ -436,7 +436,7 @@ export class AstTransformer implements AstVisitor {
   }
 
   visitAll(asts: any[]): any[] {
-    const res = new Array(asts.length);
+    const res = [];
     for (let i = 0; i < asts.length; ++i) {
       res[i] = asts[i].visit(this);
     }
@@ -598,7 +598,7 @@ export class AstMemoryEfficientTransformer implements AstVisitor {
   }
 
   visitAll(asts: any[]): any[] {
-    const res = new Array(asts.length);
+    const res = [];
     let modified = false;
     for (let i = 0; i < asts.length; ++i) {
       const original = asts[i];

packages/compiler/src/i18n/digest.ts

@@ -6,7 +6,7 @@
  * found in the LICENSE file at https://angular.io/license
  */
 
-import {utf8Encode} from '../util';
+import {newArray, utf8Encode} from '../util';
 
 import * as i18n from './i18n_ast';
 
@@ -93,7 +93,7 @@ export function sha1(str: string): string {
   const words32 = stringToWords32(utf8, Endian.Big);
   const len = utf8.length * 8;
 
-  const w = new Array(80);
+  const w = newArray(80);
   let [a, b, c, d, e]: number[] = [0x67452301, 0xefcdab89, 0x98badcfe, 0x10325476, 0xc3d2e1f0];
 
   words32[len >> 5] |= 0x80 << (24 - len % 32);
@@ -247,9 +247,10 @@ function rol64([hi, lo]: [number, number], count: number): [number, number] {
 }
 
 function stringToWords32(str: string, endian: Endian): number[] {
-  const words32 = Array((str.length + 3) >>> 2);
+  const size = (str.length + 3) >>> 2;
+  const words32 = [];
 
-  for (let i = 0; i < words32.length; i++) {
+  for (let i = 0; i < size; i++) {
     words32[i] = wordAt(str, i * 4, endian);
   }
 

packages/compiler/src/template_parser/template_parser.ts

@@ -24,7 +24,7 @@ import {ProviderElementContext, ProviderViewContext} from '../provider_analyzer'
 import {ElementSchemaRegistry} from '../schema/element_schema_registry';
 import {CssSelector, SelectorMatcher} from '../selector';
 import {isStyleUrlResolvable} from '../style_url_resolver';
-import {Console, syntaxError} from '../util';
+import {Console, newArray, syntaxError} from '../util';
 
 import {BindingParser} from './binding_parser';
 import * as t from './template_ast';
@@ -528,7 +528,7 @@ class TemplateParseVisitor implements html.Visitor {
     // Need to sort the directives so that we get consistent results throughout,
     // as selectorMatcher uses Maps inside.
     // Also deduplicate directives as they might match more than one time!
-    const directives = new Array(this.directivesIndex.size);
+    const directives = newArray(this.directivesIndex.size);
     // Whether any directive selector matches on the element name
     let matchElement = false;
 

packages/compiler/src/util.ts

@@ -253,3 +253,13 @@ const __global = typeof global !== 'undefined' && global;
 // should be __global in that case.
 const _global: {[name: string]: any} = __global || __window || __self;
 export {_global as global};
+
+export function newArray<T = any>(size: number): T[];
+export function newArray<T>(size: number, value: T): T[];
+export function newArray<T>(size: number, value?: T): T[] {
+  const list: T[] = [];
+  for (let i = 0; i < size; i++) {
+    list.push(value !);
+  }
+  return list;
+}

packages/compiler/test/aot/test_util.ts

@@ -10,6 +10,7 @@ import {AotCompilerHost, AotCompilerOptions, GeneratedFile, createAotCompiler, t
 import {MetadataBundlerHost} from '@angular/compiler-cli/src/metadata/bundler';
 import {MetadataCollector} from '@angular/compiler-cli/src/metadata/collector';
 import {ModuleMetadata} from '@angular/compiler-cli/src/metadata/index';
+import {newArray} from '@angular/compiler/src/util';
 import * as fs from 'fs';
 import * as path from 'path';
 import * as ts from 'typescript';
@@ -686,7 +687,7 @@ export function expectNoDiagnostics(program: ts.Program) {
     return '';
   }
 
-  function chars(len: number, ch: string): string { return new Array(len).fill(ch).join(''); }
+  function chars(len: number, ch: string): string { return newArray(len, ch).join(''); }
 
   function lineNoOf(offset: number, text: string): number {
     let result = 1;

packages/compiler/test/output/js_emitter_spec.ts

@@ -9,6 +9,7 @@
 import {StaticSymbol} from '@angular/compiler/src/aot/static_symbol';
 import {JavaScriptEmitter} from '@angular/compiler/src/output/js_emitter';
 import * as o from '@angular/compiler/src/output/output_ast';
+import {newArray} from '@angular/compiler/src/util';
 
 import {stripSourceMapAndNewLine} from './abstract_emitter_spec';
 
@@ -108,7 +109,7 @@ const externalModuleIdentifier = new o.ExternalReference(anotherModuleUrl, 'some
     });
 
     it('should break expressions into multiple lines if they are too long', () => {
-      const values: o.Expression[] = new Array(100);
+      const values: o.Expression[] = newArray(100);
       values.fill(o.literal(1));
       values.splice(50, 0, o.fn([], [new o.ReturnStatement(o.literal(1))]));
       expect(emitStmt(o.variable('fn').callFn(values).toStmt())).toEqual([

packages/compiler/test/output/output_jit_spec.ts

@@ -10,6 +10,7 @@ import {EmitterVisitorContext} from '@angular/compiler/src/output/abstract_emitt
 import * as o from '@angular/compiler/src/output/output_ast';
 import {JitEmitterVisitor, JitEvaluator} from '@angular/compiler/src/output/output_jit';
 import {R3JitReflector} from '@angular/compiler/src/render3/r3_jit';
+import {newArray} from '@angular/compiler/src/util';
 import {JitReflector} from '@angular/platform-browser-dynamic/src/compiler_reflector';
 
 const anotherModuleUrl = 'somePackage/someOtherPath';
@@ -18,10 +19,10 @@ const anotherModuleUrl = 'somePackage/someOtherPath';
   describe('Output JIT', () => {
     describe('regression', () => {
       it('should generate unique argument names', () => {
-        const externalIds = new Array(10).fill(1).map(
+        const externalIds = newArray(10, 1).map(
             (_, index) =>
                 new o.ExternalReference(anotherModuleUrl, `id_${index}_`, {name: `id_${index}_`}));
-        const externalIds1 = new Array(10).fill(1).map(
+        const externalIds1 = newArray(10, 1).map(
             (_, index) => new o.ExternalReference(
                 anotherModuleUrl, `id_${index}_1`, {name: `id_${index}_1`}));
         const ctx = EmitterVisitorContext.createRoot();

packages/compiler/test/output/ts_emitter_spec.ts

@@ -10,6 +10,8 @@ import {StaticSymbol} from '@angular/compiler/src/aot/static_symbol';
 import * as o from '@angular/compiler/src/output/output_ast';
 import {TypeScriptEmitter} from '@angular/compiler/src/output/ts_emitter';
 import {ParseLocation, ParseSourceFile, ParseSourceSpan} from '@angular/compiler/src/parse_util';
+import {newArray} from '@angular/compiler/src/util';
+
 import {stripSourceMapAndNewLine} from './abstract_emitter_spec';
 
 const someGenFilePath = 'somePackage/someGenFile';
@@ -160,7 +162,7 @@ const externalModuleIdentifier = new o.ExternalReference(anotherModuleUrl, 'some
     });
 
     it('should break expressions into multiple lines if they are too long', () => {
-      const values: o.Expression[] = new Array(100);
+      const values: o.Expression[] = newArray(100);
       values.fill(o.literal(1));
       values.splice(50, 0, o.fn([], [new o.ReturnStatement(o.literal(1))]));
       expect(emitStmt(o.variable('fn').callFn(values).toStmt())).toEqual([

packages/compiler/test/template_parser/template_parser_spec.ts

@@ -19,7 +19,7 @@ import {JitReflector} from '@angular/platform-browser-dynamic/src/compiler_refle
 import {CompileEntryComponentMetadata, CompileStylesheetMetadata} from '../../src/compile_metadata';
 import {Identifiers, createTokenForExternalReference, createTokenForReference} from '../../src/identifiers';
 import {DEFAULT_INTERPOLATION_CONFIG, InterpolationConfig} from '../../src/ml_parser/interpolation_config';
-import {noUndefined} from '../../src/util';
+import {newArray, noUndefined} from '../../src/util';
 import {MockSchemaRegistry} from '../../testing';
 import {unparse} from '../expression_parser/utils/unparser';
 import {TEST_COMPILER_PROVIDERS} from '../test_bindings';
@@ -481,7 +481,7 @@ class ArrayConsole implements Console {
         new BoundDirectivePropertyAst('foo', 'bar', null !, null !)
       ];
       const result = templateVisitAll(visitor, nodes, null);
-      expect(result).toEqual(new Array(nodes.length).fill(true));
+      expect(result).toEqual(newArray(nodes.length).fill(true));
     });
   });
 

packages/core/src/di/r3_injector.ts

@@ -11,9 +11,8 @@ import '../util/ng_dev_mode';
 import {OnDestroy} from '../interface/lifecycle_hooks';
 import {Type} from '../interface/type';
 import {throwCyclicDependencyError, throwInvalidProviderError, throwMixedMultiProviderError} from '../render3/errors';
-import {deepForEach} from '../util/array_utils';
+import {deepForEach, newArray} from '../util/array_utils';
 import {stringify} from '../util/stringify';
-
 import {resolveForwardRef} from './forward_ref';
 import {InjectionToken} from './injection_token';
 import {Injector} from './injector';
@@ -428,7 +427,7 @@ function getUndecoratedInjectableFactory(token: Function) {
   // If the token has parameters then it has dependencies that we cannot resolve implicitly.
   const paramLength = token.length;
   if (paramLength > 0) {
-    const args: string[] = new Array(paramLength).fill('?');
+    const args: string[] = newArray(paramLength, '?');
     throw new Error(`Can't resolve all parameters for ${stringify(token)}: (${args.join(', ')}).`);
   }
 

packages/core/src/di/reflective_injector.ts

@@ -288,8 +288,8 @@ export class ReflectiveInjector_ implements ReflectiveInjector {
 
     const len = _providers.length;
 
-    this.keyIds = new Array(len);
-    this.objs = new Array(len);
+    this.keyIds = [];
+    this.objs = [];
 
     for (let i = 0; i < len; i++) {
       this.keyIds[i] = _providers[i].key.id;
@@ -339,7 +339,7 @@ export class ReflectiveInjector_ implements ReflectiveInjector {
 
   private _instantiateProvider(provider: ResolvedReflectiveProvider): any {
     if (provider.multiProvider) {
-      const res = new Array(provider.resolvedFactories.length);
+      const res = [];
       for (let i = 0; i < provider.resolvedFactories.length; ++i) {
         res[i] = this._instantiate(provider, provider.resolvedFactories[i]);
       }
@@ -455,7 +455,7 @@ export class ReflectiveInjector_ implements ReflectiveInjector {
 }
 
 function _mapProviders(injector: ReflectiveInjector_, fn: Function): any[] {
-  const res: any[] = new Array(injector._providers.length);
+  const res: any[] = [];
   for (let i = 0; i < injector._providers.length; ++i) {
     res[i] = fn(injector.getProviderAtIndex(i));
   }

packages/core/src/reflection/reflection_capabilities.ts

@@ -7,10 +7,10 @@
  */
 
 import {Type, isType} from '../interface/type';
+import {newArray} from '../util/array_utils';
 import {ANNOTATIONS, PARAMETERS, PROP_METADATA} from '../util/decorators';
 import {global} from '../util/global';
 import {stringify} from '../util/stringify';
-
 import {PlatformReflectionCapabilities} from './platform_reflection_capabilities';
 import {GetterFn, MethodFn, SetterFn} from './types';
 
@@ -53,9 +53,9 @@ export class ReflectionCapabilities implements PlatformReflectionCapabilities {
     let result: any[][];
 
     if (typeof paramTypes === 'undefined') {
-      result = new Array(paramAnnotations.length);
+      result = newArray(paramAnnotations.length);
     } else {
-      result = new Array(paramTypes.length);
+      result = newArray(paramTypes.length);
     }
 
     for (let i = 0; i < result.length; i++) {
@@ -120,7 +120,7 @@ export class ReflectionCapabilities implements PlatformReflectionCapabilities {
     // based on function.length.
     // Note: We know that this is a real constructor as we checked
     // the content of the constructor above.
-    return new Array((<any>type.length)).fill(undefined);
+    return newArray<any[]>(type.length);
   }
 
   parameters(type: Type<any>): any[][] {

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

@@ -5,6 +5,7 @@
  * Use of this source code is governed by an MIT-style license that can be
  * found in the LICENSE file at https://angular.io/license
  */
+import {newArray} from '../../util/array_utils';
 import {TAttributes, TElementNode, TNode, TNodeType} from '../interfaces/node';
 import {ProjectionSlots} from '../interfaces/projection';
 import {TVIEW, T_HOST} from '../interfaces/view';
@@ -81,7 +82,7 @@ export function ɵɵprojectionDef(projectionSlots?: ProjectionSlots): void {
     // projection slot with the wildcard selector.
     const numProjectionSlots = projectionSlots ? projectionSlots.length : 1;
     const projectionHeads: (TNode | null)[] = componentNode.projection =
-        new Array(numProjectionSlots).fill(null);
+        newArray(numProjectionSlots, null !as TNode);
     const tails: (TNode | null)[] = projectionHeads.slice();
 
     let componentChild: TNode|null = componentNode.child;

packages/core/src/render3/query.ts

@@ -48,7 +48,7 @@ class LQueries_ implements LQueries {
     if (tQueries !== null) {
       const noOfInheritedQueries =
           tView.contentQueries !== null ? tView.contentQueries[0] : tQueries.length;
-      const viewLQueries: LQuery<any>[] = new Array(noOfInheritedQueries);
+      const viewLQueries: LQuery<any>[] = [];
 
       // An embedded view has queries propagated from a declaration view at the beginning of the
       // TQueries collection and up until a first content query declared in the embedded view. Only
@@ -57,7 +57,7 @@ class LQueries_ implements LQueries {
       for (let i = 0; i < noOfInheritedQueries; i++) {
         const tQuery = tQueries.getByIndex(i);
         const parentLQuery = this.queries[tQuery.indexInDeclarationView];
-        viewLQueries[i] = parentLQuery.clone();
+        viewLQueries.push(parentLQuery.clone());
       }
 
       return new LQueries_(viewLQueries);
@@ -313,19 +313,18 @@ function materializeViewResults<T>(lView: LView, tQuery: TQuery, queryIndex: num
   if (lQuery.matches === null) {
     const tViewData = lView[TVIEW].data;
     const tQueryMatches = tQuery.matches !;
-    const result: T|null[] = new Array(tQueryMatches.length / 2);
+    const result: T|null[] = [];
     for (let i = 0; i < tQueryMatches.length; i += 2) {
       const matchedNodeIdx = tQueryMatches[i];
       if (matchedNodeIdx < 0) {
         // we at the <ng-template> marker which might have results in views created based on this
         // <ng-template> - those results will be in separate views though, so here we just leave
         // null as a placeholder
-        result[i / 2] = null;
+        result.push(null);
       } else {
         ngDevMode && assertDataInRange(tViewData, matchedNodeIdx);
         const tNode = tViewData[matchedNodeIdx] as TNode;
-        result[i / 2] =
-            createResultForNode(lView, tNode, tQueryMatches[i + 1], tQuery.metadata.read);
+        result.push(createResultForNode(lView, tNode, tQueryMatches[i + 1], tQuery.metadata.read));
       }
     }
     lQuery.matches = result;

packages/core/src/util/array_utils.ts

@@ -60,4 +60,14 @@ export function removeFromArray(arr: any[], index: number): any {
   } else {
     return arr.splice(index, 1)[0];
   }
+}
+
+export function newArray<T = any>(size: number): T[];
+export function newArray<T>(size: number, value: T): T[];
+export function newArray<T>(size: number, value?: T): T[] {
+  const list: T[] = [];
+  for (let i = 0; i < size; i++) {
+    list.push(value !);
+  }
+  return list;
 }

packages/core/src/view/element.ts

@@ -73,7 +73,7 @@ export function elementDef(
     [ns, name] = splitNamespace(namespaceAndName);
   }
   bindings = bindings || [];
-  const bindingDefs: BindingDef[] = new Array(bindings.length);
+  const bindingDefs: BindingDef[] = [];
   for (let i = 0; i < bindings.length; i++) {
     const [bindingFlags, namespaceAndName, suffixOrSecurityContext] = bindings[i];
 
@@ -93,7 +93,7 @@ export function elementDef(
         {flags: bindingFlags, ns, name, nonMinifiedName: name, securityContext, suffix};
   }
   outputs = outputs || [];
-  const outputDefs: OutputDef[] = new Array(outputs.length);
+  const outputDefs: OutputDef[] = [];
   for (let i = 0; i < outputs.length; i++) {
     const [target, eventName] = outputs[i];
     outputDefs[i] = {

packages/core/src/view/ng_module.ts

@@ -12,6 +12,7 @@ import {INJECTOR, setCurrentInjector} from '../di/injector_compatibility';
 import {getInjectableDef, ɵɵInjectableDef} from '../di/interface/defs';
 import {APP_ROOT} from '../di/scope';
 import {NgModuleRef} from '../linker/ng_module_factory';
+import {newArray} from '../util/array_utils';
 import {stringify} from '../util/stringify';
 
 import {DepDef, DepFlags, NgModuleData, NgModuleDefinition, NgModuleProviderDef, NodeFlags} from './types';
@@ -65,7 +66,7 @@ export function moduleDef(providers: NgModuleProviderDef[]): NgModuleDefinition
 
 export function initNgModule(data: NgModuleData) {
   const def = data._def;
-  const providers = data._providers = new Array(def.providers.length);
+  const providers = data._providers = newArray(def.providers.length);
   for (let i = 0; i < def.providers.length; i++) {
     const provDef = def.providers[i];
     if (!(provDef.flags & NodeFlags.LazyProvider)) {
@@ -179,7 +180,7 @@ function _createClass(ngModule: NgModuleData, ctor: any, deps: DepDef[]): any {
           resolveNgModuleDep(ngModule, deps[0]), resolveNgModuleDep(ngModule, deps[1]),
           resolveNgModuleDep(ngModule, deps[2]));
     default:
-      const depValues = new Array(len);
+      const depValues = [];
       for (let i = 0; i < len; i++) {
         depValues[i] = resolveNgModuleDep(ngModule, deps[i]);
       }
@@ -201,7 +202,7 @@ function _callFactory(ngModule: NgModuleData, factory: any, deps: DepDef[]): any
           resolveNgModuleDep(ngModule, deps[0]), resolveNgModuleDep(ngModule, deps[1]),
           resolveNgModuleDep(ngModule, deps[2]));
     default:
-      const depValues = Array(len);
+      const depValues = [];
       for (let i = 0; i < len; i++) {
         depValues[i] = resolveNgModuleDep(ngModule, deps[i]);
       }

packages/core/src/view/provider.ts

@@ -278,9 +278,9 @@ function createClass(
           resolveDep(view, elDef, allowPrivateServices, deps[1]),
           resolveDep(view, elDef, allowPrivateServices, deps[2]));
     default:
-      const depValues = new Array(len);
+      const depValues = [];
       for (let i = 0; i < len; i++) {
-        depValues[i] = resolveDep(view, elDef, allowPrivateServices, deps[i]);
+        depValues.push(resolveDep(view, elDef, allowPrivateServices, deps[i]));
       }
       return new ctor(...depValues);
   }
@@ -305,9 +305,9 @@ function callFactory(
           resolveDep(view, elDef, allowPrivateServices, deps[1]),
           resolveDep(view, elDef, allowPrivateServices, deps[2]));
     default:
-      const depValues = Array(len);
+      const depValues = [];
       for (let i = 0; i < len; i++) {
-        depValues[i] = resolveDep(view, elDef, allowPrivateServices, deps[i]);
+        depValues.push(resolveDep(view, elDef, allowPrivateServices, deps[i]));
       }
       return factory(...depValues);
   }

packages/core/src/view/pure_expression.ts

@@ -6,26 +6,28 @@
  * found in the LICENSE file at https://angular.io/license
  */
 
+import {newArray} from '../util/array_utils';
+
 import {BindingDef, BindingFlags, NodeDef, NodeFlags, PureExpressionData, ViewData, asPureExpressionData} from './types';
 import {calcBindingFlags, checkAndUpdateBinding} from './util';
 
 export function purePipeDef(checkIndex: number, argCount: number): NodeDef {
   // argCount + 1 to include the pipe as first arg
-  return _pureExpressionDef(NodeFlags.TypePurePipe, checkIndex, new Array(argCount + 1));
+  return _pureExpressionDef(NodeFlags.TypePurePipe, checkIndex, newArray(argCount + 1));
 }
 
 export function pureArrayDef(checkIndex: number, argCount: number): NodeDef {
-  return _pureExpressionDef(NodeFlags.TypePureArray, checkIndex, new Array(argCount));
+  return _pureExpressionDef(NodeFlags.TypePureArray, checkIndex, newArray(argCount));
 }
 
 export function pureObjectDef(checkIndex: number, propToIndex: {[p: string]: number}): NodeDef {
   const keys = Object.keys(propToIndex);
   const nbKeys = keys.length;
-  const propertyNames = new Array(nbKeys);
+  const propertyNames = [];
   for (let i = 0; i < nbKeys; i++) {
     const key = keys[i];
     const index = propToIndex[key];
-    propertyNames[index] = key;
+    propertyNames.push(key);
   }
 
   return _pureExpressionDef(NodeFlags.TypePureObject, checkIndex, propertyNames);
@@ -33,17 +35,17 @@ export function pureObjectDef(checkIndex: number, propToIndex: {[p: string]: num
 
 function _pureExpressionDef(
     flags: NodeFlags, checkIndex: number, propertyNames: string[]): NodeDef {
-  const bindings: BindingDef[] = new Array(propertyNames.length);
+  const bindings: BindingDef[] = [];
   for (let i = 0; i < propertyNames.length; i++) {
     const prop = propertyNames[i];
-    bindings[i] = {
+    bindings.push({
       flags: BindingFlags.TypeProperty,
       name: prop,
       ns: null,
       nonMinifiedName: prop,
       securityContext: null,
       suffix: null
-    };
+    });
   }
   return {
     // will bet set by the view definition
@@ -99,17 +101,17 @@ export function checkAndUpdatePureExpressionInline(
     let value: any;
     switch (def.flags & NodeFlags.Types) {
       case NodeFlags.TypePureArray:
-        value = new Array(bindings.length);
-        if (bindLen > 0) value[0] = v0;
-        if (bindLen > 1) value[1] = v1;
-        if (bindLen > 2) value[2] = v2;
-        if (bindLen > 3) value[3] = v3;
-        if (bindLen > 4) value[4] = v4;
-        if (bindLen > 5) value[5] = v5;
-        if (bindLen > 6) value[6] = v6;
-        if (bindLen > 7) value[7] = v7;
-        if (bindLen > 8) value[8] = v8;
-        if (bindLen > 9) value[9] = v9;
+        value = [];
+        if (bindLen > 0) value.push(v0);
+        if (bindLen > 1) value.push(v1);
+        if (bindLen > 2) value.push(v2);
+        if (bindLen > 3) value.push(v3);
+        if (bindLen > 4) value.push(v4);
+        if (bindLen > 5) value.push(v5);
+        if (bindLen > 6) value.push(v6);
+        if (bindLen > 7) value.push(v7);
+        if (bindLen > 8) value.push(v8);
+        if (bindLen > 9) value.push(v9);
         break;
       case NodeFlags.TypePureObject:
         value = {};

packages/core/src/view/text.ts

@@ -11,7 +11,7 @@ import {checkAndUpdateBinding, getParentRenderElement} from './util';
 
 export function textDef(
     checkIndex: number, ngContentIndex: number | null, staticText: string[]): NodeDef {
-  const bindings: BindingDef[] = new Array(staticText.length - 1);
+  const bindings: BindingDef[] = [];
   for (let i = 1; i < staticText.length; i++) {
     bindings[i - 1] = {
       flags: BindingFlags.TypeProperty,

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

@@ -173,6 +173,9 @@
   {
     "name": "makeRecord"
   },
+  {
+    "name": "newArray"
+  },
   {
     "name": "providerToFactory"
   },

packages/platform-browser/src/browser/browser_adapter.ts

@@ -168,7 +168,7 @@ export class BrowserDomAdapter extends GenericBrowserDomAdapter {
   childNodes(el: any): Node[] { return el.childNodes; }
   childNodesAsList(el: Node): any[] {
     const childNodes = el.childNodes;
-    const res = new Array(childNodes.length);
+    const res = [];
     for (let i = 0; i < childNodes.length; i++) {
       res[i] = childNodes[i];
     }

packages/platform-webworker/src/web_workers/shared/service_message_broker.ts

@@ -60,7 +60,7 @@ export class ServiceMessageBroker {
     this._methods.set(methodName, (message: ReceivedMessage) => {
       const serializedArgs = message.args;
       const numArgs = signature ? signature.length : 0;
-      const deserializedArgs = new Array(numArgs);
+      const deserializedArgs = [];
       for (let i = 0; i < numArgs; i++) {
         const serializedArg = serializedArgs[i];
         deserializedArgs[i] = this._serializer.deserialize(serializedArg, signature ![i]);

packages/service-worker/cli/sha1.ts

@@ -29,7 +29,7 @@ export function sha1Binary(buffer: ArrayBuffer): string {
 }
 
 function _sha1(words32: number[], len: number): string {
-  const w = new Array(80);
+  const w: number[] = [];
   let [a, b, c, d, e]: number[] = [0x67452301, 0xefcdab89, 0x98badcfe, 0x10325476, 0xc3d2e1f0];
 
   words32[len >> 5] |= 0x80 << (24 - len % 32);
@@ -113,9 +113,10 @@ function fk(index: number, b: number, c: number, d: number): [number, number] {
 
 
 function stringToWords32(str: string, endian: Endian): number[] {
-  const words32 = Array((str.length + 3) >>> 2);
+  const size = (str.length + 3) >>> 2;
+  const words32 = [];
 
-  for (let i = 0; i < words32.length; i++) {
+  for (let i = 0; i < size; i++) {
     words32[i] = wordAt(str, i * 4, endian);
   }
 
@@ -123,9 +124,10 @@ function stringToWords32(str: string, endian: Endian): number[] {
 }
 
 function arrayBufferToWords32(buffer: ArrayBuffer, endian: Endian): number[] {
-  const words32 = Array((buffer.byteLength + 3) >>> 2);
+  const size = (buffer.byteLength + 3) >>> 2;
+  const words32: number[] = [];
   const view = new Uint8Array(buffer);
-  for (let i = 0; i < words32.length; i++) {
+  for (let i = 0; i < size; i++) {
     words32[i] = wordAt(view, i * 4, endian);
   }
   return words32;

packages/service-worker/worker/src/sha1.ts

@@ -29,7 +29,7 @@ export function sha1Binary(buffer: ArrayBuffer): string {
 }
 
 function _sha1(words32: number[], len: number): string {
-  const w = new Array(80);
+  const w: number[] = [];
   let [a, b, c, d, e]: number[] = [0x67452301, 0xefcdab89, 0x98badcfe, 0x10325476, 0xc3d2e1f0];
 
   words32[len >> 5] |= 0x80 << (24 - len % 32);
@@ -113,9 +113,10 @@ function fk(index: number, b: number, c: number, d: number): [number, number] {
 
 
 function stringToWords32(str: string, endian: Endian): number[] {
-  const words32 = Array((str.length + 3) >>> 2);
+  const size = (str.length + 3) >>> 2;
+  const words32 = [];
 
-  for (let i = 0; i < words32.length; i++) {
+  for (let i = 0; i < size; i++) {
     words32[i] = wordAt(str, i * 4, endian);
   }
 
@@ -123,9 +124,10 @@ function stringToWords32(str: string, endian: Endian): number[] {
 }
 
 function arrayBufferToWords32(buffer: ArrayBuffer, endian: Endian): number[] {
-  const words32 = Array((buffer.byteLength + 3) >>> 2);
+  const size = (buffer.byteLength + 3) >>> 2;
+  const words32: number[] = [];
   const view = new Uint8Array(buffer);
-  for (let i = 0; i < words32.length; i++) {
+  for (let i = 0; i < size; i++) {
     words32[i] = wordAt(view, i * 4, endian);
   }
   return words32;