diff --git a/modules/angular2/src/common/forms/model.ts b/modules/angular2/src/common/forms/model.ts
index 20982a3008..bb89271e8a 100644
--- a/modules/angular2/src/common/forms/model.ts
+++ b/modules/angular2/src/common/forms/model.ts
@@ -31,16 +31,17 @@ function _find(control: AbstractControl, path: Array<string | number>| string) {
   }
   if (path instanceof Array && ListWrapper.isEmpty(path)) return null;
 
-  return ListWrapper.reduce(<Array<string | number>>path, (v, name) => {
-    if (v instanceof ControlGroup) {
-      return isPresent(v.controls[name]) ? v.controls[name] : null;
-    } else if (v instanceof ControlArray) {
-      var index = <number>name;
-      return isPresent(v.at(index)) ? v.at(index) : null;
-    } else {
-      return null;
-    }
-  }, control);
+  return (<Array<string | number>>path)
+      .reduce((v, name) => {
+        if (v instanceof ControlGroup) {
+          return isPresent(v.controls[name]) ? v.controls[name] : null;
+        } else if (v instanceof ControlArray) {
+          var index = <number>name;
+          return isPresent(v.at(index)) ? v.at(index) : null;
+        } else {
+          return null;
+        }
+      }, control);
 }
 
 function toObservable(r: any): Observable<any> {
@@ -480,7 +481,7 @@ export class ControlArray extends AbstractControl {
 
   /** @internal */
   _anyControlsHaveStatus(status: string): boolean {
-    return ListWrapper.any(this.controls, c => c.status == status);
+    return this.controls.some(c => c.status == status);
   }
 
 
diff --git a/modules/angular2/src/common/forms/validators.ts b/modules/angular2/src/common/forms/validators.ts
index 5026244eb9..8255c7877e 100644
--- a/modules/angular2/src/common/forms/validators.ts
+++ b/modules/angular2/src/common/forms/validators.ts
@@ -80,7 +80,7 @@ export class Validators {
    */
   static compose(validators: Function[]): Function {
     if (isBlank(validators)) return null;
-    var presentValidators = ListWrapper.filter(validators, isPresent);
+    var presentValidators = validators.filter(isPresent);
     if (presentValidators.length == 0) return null;
 
     return function(control: modelModule.AbstractControl) {
@@ -90,7 +90,7 @@ export class Validators {
 
   static composeAsync(validators: Function[]): Function {
     if (isBlank(validators)) return null;
-    let presentValidators = ListWrapper.filter(validators, isPresent);
+    var presentValidators = validators.filter(isPresent);
     if (presentValidators.length == 0) return null;
 
     return function(control: modelModule.AbstractControl) {
@@ -109,7 +109,7 @@ function _executeValidators(control: modelModule.AbstractControl, validators: Fu
 }
 
 function _mergeErrors(arrayOfErrors: any[]): {[key: string]: any} {
-  var res = ListWrapper.reduce(arrayOfErrors, (res, errors) => {
+  var res = arrayOfErrors.reduce((res, errors) => {
     return isPresent(errors) ? StringMapWrapper.merge(<any>res, <any>errors) : res;
   }, {});
   return StringMapWrapper.isEmpty(res) ? null : res;
diff --git a/modules/angular2/src/compiler/runtime_metadata.ts b/modules/angular2/src/compiler/runtime_metadata.ts
index b262207df3..2f3b810299 100644
--- a/modules/angular2/src/compiler/runtime_metadata.ts
+++ b/modules/angular2/src/compiler/runtime_metadata.ts
@@ -60,8 +60,7 @@ export class RuntimeMetadataResolver {
         inputs: dirMeta.inputs,
         outputs: dirMeta.outputs,
         host: dirMeta.host,
-        lifecycleHooks: ListWrapper.filter(LIFECYCLE_HOOKS_VALUES,
-                                           hook => hasLifecycleHook(hook, directiveType))
+        lifecycleHooks: LIFECYCLE_HOOKS_VALUES.filter(hook => hasLifecycleHook(hook, directiveType))
       });
       this._cache.set(directiveType, meta);
     }
diff --git a/modules/angular2/src/compiler/template_normalizer.ts b/modules/angular2/src/compiler/template_normalizer.ts
index 15f976e0b7..b61e5594a0 100644
--- a/modules/angular2/src/compiler/template_normalizer.ts
+++ b/modules/angular2/src/compiler/template_normalizer.ts
@@ -4,7 +4,6 @@ import {
   CompileTemplateMetadata
 } from './directive_metadata';
 import {isPresent, isBlank} from 'angular2/src/facade/lang';
-import {ListWrapper} from 'angular2/src/facade/collection';
 import {BaseException} from 'angular2/src/facade/exceptions';
 import {Promise, PromiseWrapper} from 'angular2/src/facade/async';
 
@@ -55,9 +54,9 @@ export class TemplateNormalizer {
     var allStyles = templateMeta.styles.concat(visitor.styles);
 
     var allStyleAbsUrls =
-        ListWrapper.filter(visitor.styleUrls, isStyleUrlResolvable)
+        visitor.styleUrls.filter(isStyleUrlResolvable)
             .map(url => this._urlResolver.resolve(templateAbsUrl, url))
-            .concat(ListWrapper.filter(templateMeta.styleUrls, isStyleUrlResolvable)
+            .concat(templateMeta.styleUrls.filter(isStyleUrlResolvable)
                         .map(url => this._urlResolver.resolve(directiveType.moduleUrl, url)));
 
     var allResolvedStyles = allStyles.map(style => {
diff --git a/modules/angular2/src/compiler/template_parser.ts b/modules/angular2/src/compiler/template_parser.ts
index f14d029348..68c3ae8614 100644
--- a/modules/angular2/src/compiler/template_parser.ts
+++ b/modules/angular2/src/compiler/template_parser.ts
@@ -227,7 +227,7 @@ class TemplateParseVisitor implements HtmlAstVisitor {
                                               elementNgContentIndex, element.sourceInfo);
     } else {
       this._assertOnlyOneComponent(directives, element.sourceInfo);
-      var elementExportAsVars = ListWrapper.filter(vars, varAst => varAst.value.length === 0);
+      var elementExportAsVars = vars.filter(varAst => varAst.value.length === 0);
       parsedElement =
           new ElementAst(nodeName, attrs, elementProps, events, elementExportAsVars, directives,
                          children, elementNgContentIndex, element.sourceInfo);
diff --git a/modules/angular2/src/core/change_detection/coalesce.ts b/modules/angular2/src/core/change_detection/coalesce.ts
index 6f9004e35c..1a0832ecf3 100644
--- a/modules/angular2/src/core/change_detection/coalesce.ts
+++ b/modules/angular2/src/core/change_detection/coalesce.ts
@@ -120,9 +120,8 @@ function _mayBeAddRecord(record: ProtoRecord, dstRecords: ProtoRecord[], exclude
  */
 function _findFirstMatch(record: ProtoRecord, dstRecords: ProtoRecord[],
                          excludedIdxs: number[]): ProtoRecord {
-  return ListWrapper.find(
-      dstRecords,
-      // TODO(vicb): optimize notReusableIndexes.indexOf (sorted array)
+  return dstRecords.find(
+      // TODO(vicb): optimize excludedIdxs.indexOf (sorted array)
       rr => excludedIdxs.indexOf(rr.selfIndex) == -1 && rr.mode !== RecordType.DirectiveLifecycle &&
             _haveSameDirIndex(rr, record) && rr.mode === record.mode &&
             looseIdentical(rr.funcOrValue, record.funcOrValue) &&
diff --git a/modules/angular2/src/core/change_detection/codegen_name_util.ts b/modules/angular2/src/core/change_detection/codegen_name_util.ts
index dbeb4a5b9c..0c423edd32 100644
--- a/modules/angular2/src/core/change_detection/codegen_name_util.ts
+++ b/modules/angular2/src/core/change_detection/codegen_name_util.ts
@@ -180,7 +180,7 @@ export class CodegenNameUtil {
    * Generates statements destroying all pipe variables.
    */
   genPipeOnDestroy(): string {
-    return ListWrapper.filter(this._records, (r) => { return r.isPipeRecord(); })
+    return this._records.filter(r => r.isPipeRecord())
         .map(r => `${this._utilName}.callPipeOnDestroy(${this.getPipeName(r.selfIndex)});`)
         .join('\n');
   }
diff --git a/modules/angular2/src/core/change_detection/differs/iterable_differs.ts b/modules/angular2/src/core/change_detection/differs/iterable_differs.ts
index 613fbfbb74..c6a69084d9 100644
--- a/modules/angular2/src/core/change_detection/differs/iterable_differs.ts
+++ b/modules/angular2/src/core/change_detection/differs/iterable_differs.ts
@@ -71,7 +71,7 @@ export class IterableDiffers {
   }
 
   find(iterable: Object): IterableDifferFactory {
-    var factory = ListWrapper.find(this.factories, f => f.supports(iterable));
+    var factory = this.factories.find(f => f.supports(iterable));
     if (isPresent(factory)) {
       return factory;
     } else {
diff --git a/modules/angular2/src/core/change_detection/differs/keyvalue_differs.ts b/modules/angular2/src/core/change_detection/differs/keyvalue_differs.ts
index c5a173af9d..3c7d248541 100644
--- a/modules/angular2/src/core/change_detection/differs/keyvalue_differs.ts
+++ b/modules/angular2/src/core/change_detection/differs/keyvalue_differs.ts
@@ -71,7 +71,7 @@ export class KeyValueDiffers {
   }
 
   find(kv: Object): KeyValueDifferFactory {
-    var factory = ListWrapper.find(this.factories, f => f.supports(kv));
+    var factory = this.factories.find(f => f.supports(kv));
     if (isPresent(factory)) {
       return factory;
     } else {
diff --git a/modules/angular2/src/core/change_detection/dynamic_change_detector.ts b/modules/angular2/src/core/change_detection/dynamic_change_detector.ts
index a6f562ae2c..f66d8af520 100644
--- a/modules/angular2/src/core/change_detection/dynamic_change_detector.ts
+++ b/modules/angular2/src/core/change_detection/dynamic_change_detector.ts
@@ -101,8 +101,7 @@ export class DynamicChangeDetector extends AbstractChangeDetector<any> {
 
   /** @internal */
   _matchingEventBindings(eventName: string, elIndex: number): EventBinding[] {
-    return ListWrapper.filter(this._eventBindings,
-                              eb => eb.eventName == eventName && eb.elIndex === elIndex);
+    return this._eventBindings.filter(eb => eb.eventName == eventName && eb.elIndex === elIndex);
   }
 
   hydrateDirectives(directives: any): void {
diff --git a/modules/angular2/src/core/debug/debug_element.ts b/modules/angular2/src/core/debug/debug_element.ts
index 0dc691c8e2..2710501401 100644
--- a/modules/angular2/src/core/debug/debug_element.ts
+++ b/modules/angular2/src/core/debug/debug_element.ts
@@ -70,9 +70,9 @@ export abstract class DebugElement {
    * @return {DebugElement[]}
    */
   queryAll(predicate: Predicate<DebugElement>, scope: Function = Scope.all): DebugElement[] {
-    var elementsInScope = scope(this);
+    var elementsInScope: any[] = scope(this);
 
-    return ListWrapper.filter(elementsInScope, predicate);
+    return elementsInScope.filter(predicate);
   }
 }
 
diff --git a/modules/angular2/src/core/di/provider.ts b/modules/angular2/src/core/di/provider.ts
index b23f74e602..c60ee1428a 100644
--- a/modules/angular2/src/core/di/provider.ts
+++ b/modules/angular2/src/core/di/provider.ts
@@ -630,7 +630,7 @@ function _constructDependencies(factoryFunction: Function, dependencies: any[]):
 function _dependenciesFor(typeOrFunc): Dependency[] {
   var params = reflector.parameters(typeOrFunc);
   if (isBlank(params)) return [];
-  if (ListWrapper.any(params, (p) => isBlank(p))) {
+  if (params.some(isBlank)) {
     throw new NoAnnotationError(typeOrFunc, params);
   }
   return params.map((p: any[]) => _extractToken(typeOrFunc, p, params));
diff --git a/modules/angular2/src/core/linker/compiler.ts b/modules/angular2/src/core/linker/compiler.ts
index 6be9566228..c4fdaea971 100644
--- a/modules/angular2/src/core/linker/compiler.ts
+++ b/modules/angular2/src/core/linker/compiler.ts
@@ -5,7 +5,6 @@ import {Injectable} from 'angular2/src/core/di';
 import {Type, isBlank, stringify} from 'angular2/src/facade/lang';
 import {BaseException} from 'angular2/src/facade/exceptions';
 import {Promise, PromiseWrapper} from 'angular2/src/facade/async';
-import {ListWrapper} from 'angular2/src/facade/collection';
 import {reflector} from 'angular2/src/core/reflection/reflection';
 import {CompiledHostTemplate} from 'angular2/src/core/linker/template_commands';
 
@@ -31,7 +30,7 @@ export class Compiler_ extends Compiler {
 
   compileInHost(componentType: Type): Promise<ProtoViewRef> {
     var metadatas = reflector.annotations(componentType);
-    var compiledHostTemplate = ListWrapper.find(metadatas, _isCompiledHostTemplate);
+    var compiledHostTemplate = metadatas.find(_isCompiledHostTemplate);
 
     if (isBlank(compiledHostTemplate)) {
       throw new BaseException(
diff --git a/modules/angular2/src/core/linker/directive_resolver.ts b/modules/angular2/src/core/linker/directive_resolver.ts
index d4895327c3..380cbc9f22 100644
--- a/modules/angular2/src/core/linker/directive_resolver.ts
+++ b/modules/angular2/src/core/linker/directive_resolver.ts
@@ -35,7 +35,7 @@ export class DirectiveResolver {
   resolve(type: Type): DirectiveMetadata {
     var typeMetadata = reflector.annotations(resolveForwardRef(type));
     if (isPresent(typeMetadata)) {
-      var metadata = ListWrapper.find(typeMetadata, _isDirectiveMetadata);
+      var metadata = typeMetadata.find(_isDirectiveMetadata);
       if (isPresent(metadata)) {
         var propertyMetadata = reflector.propMetadata(type);
         return this._mergeWithPropertyMetadata(metadata, propertyMetadata);
diff --git a/modules/angular2/src/core/linker/element_injector.ts b/modules/angular2/src/core/linker/element_injector.ts
index fcc73146ed..b684eef96c 100644
--- a/modules/angular2/src/core/linker/element_injector.ts
+++ b/modules/angular2/src/core/linker/element_injector.ts
@@ -120,14 +120,14 @@ export class DirectiveDependency extends Dependency {
   }
 
   /** @internal */
-  static _attributeName(properties): string {
-    var p = <AttributeMetadata>ListWrapper.find(properties, (p) => p instanceof AttributeMetadata);
+  static _attributeName(properties: any[]): string {
+    var p = <AttributeMetadata>properties.find(p => p instanceof AttributeMetadata);
     return isPresent(p) ? p.attributeName : null;
   }
 
   /** @internal */
-  static _query(properties): QueryMetadata {
-    return <QueryMetadata>ListWrapper.find(properties, (p) => p instanceof QueryMetadata);
+  static _query(properties: any[]): QueryMetadata {
+    return <QueryMetadata>properties.find(p => p instanceof QueryMetadata);
   }
 }
 
diff --git a/modules/angular2/src/core/linker/pipe_resolver.ts b/modules/angular2/src/core/linker/pipe_resolver.ts
index af7708146e..67683978c7 100644
--- a/modules/angular2/src/core/linker/pipe_resolver.ts
+++ b/modules/angular2/src/core/linker/pipe_resolver.ts
@@ -1,6 +1,5 @@
 import {resolveForwardRef, Injectable} from 'angular2/src/core/di';
 import {Type, isPresent, stringify} from 'angular2/src/facade/lang';
-import {ListWrapper} from 'angular2/src/facade/collection';
 import {BaseException} from 'angular2/src/facade/exceptions';
 import {PipeMetadata} from 'angular2/src/core/metadata';
 import {reflector} from 'angular2/src/core/reflection/reflection';
@@ -24,7 +23,7 @@ export class PipeResolver {
   resolve(type: Type): PipeMetadata {
     var metas = reflector.annotations(resolveForwardRef(type));
     if (isPresent(metas)) {
-      var annotation = ListWrapper.find(metas, _isPipeMetadata);
+      var annotation = metas.find(_isPipeMetadata);
       if (isPresent(annotation)) {
         return annotation;
       }
diff --git a/modules/angular2/src/core/reflection/reflection_capabilities.ts b/modules/angular2/src/core/reflection/reflection_capabilities.ts
index 085bdd58d7..371e5778ae 100644
--- a/modules/angular2/src/core/reflection/reflection_capabilities.ts
+++ b/modules/angular2/src/core/reflection/reflection_capabilities.ts
@@ -7,7 +7,6 @@ import {
   ConcreteType
 } from 'angular2/src/facade/lang';
 import {BaseException} from 'angular2/src/facade/exceptions';
-import {ListWrapper} from 'angular2/src/facade/collection';
 import {GetterFn, SetterFn, MethodFn} from './types';
 import {PlatformReflectionCapabilities} from './platform_reflection_capabilities';
 
@@ -88,9 +87,9 @@ export class ReflectionCapabilities implements PlatformReflectionCapabilities {
     var result;
 
     if (typeof paramTypes === 'undefined') {
-      result = ListWrapper.createFixedSize(paramAnnotations.length);
+      result = new Array(paramAnnotations.length);
     } else {
-      result = ListWrapper.createFixedSize(paramTypes.length);
+      result = new Array(paramTypes.length);
     }
 
     for (var i = 0; i < result.length; i++) {
@@ -123,7 +122,10 @@ export class ReflectionCapabilities implements PlatformReflectionCapabilities {
         return this._zipTypesAndAnnotaions(paramTypes, paramAnnotations);
       }
     }
-    return ListWrapper.createFixedSize((<any>typeOrFunc).length);
+    // The array has to be filled with `undefined` because holes would be skipped by `some`
+    let parameters = new Array((<any>typeOrFunc.length));
+    parameters.fill(undefined);
+    return parameters;
   }
 
   annotations(typeOrFunc: Type): any[] {
diff --git a/modules/angular2/src/core/reflection/reflector.ts b/modules/angular2/src/core/reflection/reflector.ts
index 6f4a7063a0..e19e65e944 100644
--- a/modules/angular2/src/core/reflection/reflector.ts
+++ b/modules/angular2/src/core/reflection/reflector.ts
@@ -54,7 +54,7 @@ export class Reflector {
       throw new BaseException('Usage tracking is disabled');
     }
     var allTypes = MapWrapper.keys(this._injectableInfo);
-    return ListWrapper.filter(allTypes, (key) => { return !SetWrapper.has(this._usedKeys, key); });
+    return allTypes.filter(key => !SetWrapper.has(this._usedKeys, key));
   }
 
   registerFunction(func: Function, funcInfo: ReflectionInfo): void {
diff --git a/modules/angular2/src/facade/collection.dart b/modules/angular2/src/facade/collection.dart
index fe89a16d53..54e5dcdd6c 100644
--- a/modules/angular2/src/facade/collection.dart
+++ b/modules/angular2/src/facade/collection.dart
@@ -108,25 +108,16 @@ class ListWrapper {
       new List.generate(size, (_) => null, growable: true);
 
   static bool contains(List m, k) => m.contains(k);
-  static List filter(List list, bool fn(item)) => list.where(fn).toList();
   static int indexOf(List list, value, [int startIndex = 0]) =>
       list.indexOf(value, startIndex);
   static int lastIndexOf(List list, value, [int startIndex = null]) =>
       list.lastIndexOf(value, startIndex == null ? list.length : startIndex);
-  static find(List list, bool fn(item)) =>
-      list.firstWhere(fn, orElse: () => null);
-  static bool any(List list, bool fn(item)) => list.any(fn);
 
   static void forEachWithIndex(List list, fn(item, index)) {
     for (var i = 0; i < list.length; ++i) {
       fn(list[i], i);
     }
   }
-
-  static reduce(List list, fn(a, b), init) {
-    return list.fold(init, fn);
-  }
-
   static first(List list) => list.isEmpty ? null : list.first;
   static last(List list) => list.isEmpty ? null : list.last;
   static List reversed(List list) => list.reversed.toList();
diff --git a/modules/angular2/src/facade/collection.ts b/modules/angular2/src/facade/collection.ts
index 9d67d308a3..a35e9391a9 100644
--- a/modules/angular2/src/facade/collection.ts
+++ b/modules/angular2/src/facade/collection.ts
@@ -187,27 +187,9 @@ export class ListWrapper {
     if (!array || array.length == 0) return null;
     return array[array.length - 1];
   }
-  static find<T>(list: T[], pred: Predicate<T>): T {
-    for (var i = 0; i < list.length; ++i) {
-      if (pred(list[i])) return list[i];
-    }
-    return null;
-  }
   static indexOf<T>(array: T[], value: T, startIndex: number = 0): number {
     return array.indexOf(value, startIndex);
   }
-  static reduce<T, E>(list: T[],
-                      fn: (accumValue: E, currentValue: T, currentIndex: number, array: T[]) => E,
-                      init: E): E {
-    return list.reduce(fn, init);
-  }
-  static filter<T>(array: T[], pred: Predicate<T>): T[] { return array.filter(pred); }
-  static any(list: any[], pred: Function): boolean {
-    for (var i = 0; i < list.length; ++i) {
-      if (pred(list[i])) return true;
-    }
-    return false;
-  }
   static contains<T>(list: T[], el: T): boolean { return list.indexOf(el) !== -1; }
   static reversed<T>(array: T[]): T[] {
     var a = ListWrapper.clone(array);
diff --git a/modules/angular2/src/router/router.ts b/modules/angular2/src/router/router.ts
index d7c12ef8ba..a9762e436b 100644
--- a/modules/angular2/src/router/router.ts
+++ b/modules/angular2/src/router/router.ts
@@ -526,10 +526,10 @@ class ChildRouter extends Router {
  * Returns: ['', 'a', 'b', {c: 2}]
  */
 function splitAndFlattenLinkParams(linkParams: any[]): any[] {
-  return ListWrapper.reduce(linkParams, (accumulation, item) => {
+  return linkParams.reduce((accumulation: any[], item) => {
     if (isString(item)) {
-      let parts: String[] = item.split('/');
-      return accumulation.concat(parts);
+      let strItem: string = item;
+      return accumulation.concat(strItem.split('/'));
     }
     accumulation.push(item);
     return accumulation;
diff --git a/modules/angular2/test/common/forms/directives_spec.ts b/modules/angular2/test/common/forms/directives_spec.ts
index 2346456a1b..5af2cbca5e 100644
--- a/modules/angular2/test/common/forms/directives_spec.ts
+++ b/modules/angular2/test/common/forms/directives_spec.ts
@@ -270,7 +270,7 @@ export function main() {
           var formValidator = (c) => ({"custom": true});
           var f = new NgFormModel([formValidator], []);
           f.form = formModel;
-          f.onChanges({"form":<any>formModel});
+          f.onChanges({"form": new SimpleChange(null, null)});
 
           expect(formModel.errors).toEqual({"custom": true});
         });
@@ -278,7 +278,7 @@ export function main() {
         it("should set up an async validator", fakeAsync(() => {
              var f = new NgFormModel([], [asyncValidator("expected")]);
              f.form = formModel;
-             f.onChanges({"form":<any>formModel});
+             f.onChanges({"form": new SimpleChange(null, null)});
 
              tick();
 
diff --git a/modules/benchpress/src/metric/perflog_metric.ts b/modules/benchpress/src/metric/perflog_metric.ts
index 228e7884f0..505cf825bf 100644
--- a/modules/benchpress/src/metric/perflog_metric.ts
+++ b/modules/benchpress/src/metric/perflog_metric.ts
@@ -308,14 +308,12 @@ export class PerflogMetric extends Metric {
   }
 
   _addFrameMetrics(result: {[key: string]: any}, frameTimes: any[]) {
-    result['frameTime.mean'] =
-        ListWrapper.reduce(frameTimes, (a, b) => a + b, 0) / frameTimes.length;
+    result['frameTime.mean'] = frameTimes.reduce((a, b) => a + b, 0) / frameTimes.length;
     var firstFrame = frameTimes[0];
-    result['frameTime.worst'] = ListWrapper.reduce(frameTimes, (a, b) => a > b ? a : b, firstFrame);
-    result['frameTime.best'] = ListWrapper.reduce(frameTimes, (a, b) => a < b ? a : b, firstFrame);
+    result['frameTime.worst'] = frameTimes.reduce((a, b) => a > b ? a : b, firstFrame);
+    result['frameTime.best'] = frameTimes.reduce((a, b) => a < b ? a : b, firstFrame);
     result['frameTime.smooth'] =
-        ListWrapper.filter(frameTimes, (a) => a < _FRAME_TIME_SMOOTH_THRESHOLD).length /
-        frameTimes.length;
+        frameTimes.filter(t => t < _FRAME_TIME_SMOOTH_THRESHOLD).length / frameTimes.length;
   }
 
   _markName(index) { return `${_MARK_NAME_PREFIX}${index}`; }
diff --git a/modules/benchpress/src/webdriver/chrome_driver_extension.ts b/modules/benchpress/src/webdriver/chrome_driver_extension.ts
index d5db3c18f1..ea2651fa15 100644
--- a/modules/benchpress/src/webdriver/chrome_driver_extension.ts
+++ b/modules/benchpress/src/webdriver/chrome_driver_extension.ts
@@ -201,9 +201,8 @@ export class ChromeDriverExtension extends WebDriverExtension {
 
   private _isEvent(eventCategories: string[], eventName: string, expectedCategories: string[],
                    expectedName: string = null): boolean {
-    var hasCategories = ListWrapper.reduce(expectedCategories, (value, cat) => {
-      return value && ListWrapper.contains(eventCategories, cat);
-    }, true);
+    var hasCategories = expectedCategories.reduce(
+        (value, cat) => { return value && ListWrapper.contains(eventCategories, cat); }, true);
     return isBlank(expectedName) ? hasCategories :
                                    hasCategories && StringWrapper.equals(eventName, expectedName);
   }
diff --git a/modules/playground/src/model_driven_forms/index.ts b/modules/playground/src/model_driven_forms/index.ts
index 62fb37e3bc..7d946c82c3 100644
--- a/modules/playground/src/model_driven_forms/index.ts
+++ b/modules/playground/src/model_driven_forms/index.ts
@@ -1,11 +1,11 @@
 import {bootstrap} from 'angular2/bootstrap';
 import {
   FORM_DIRECTIVES,
+  ControlGroup,
   NgControl,
   Validators,
   NgFormModel,
   FormBuilder,
-  ControlGroup,
   NgIf,
   NgFor,
   Component,
@@ -57,7 +57,8 @@ class ShowError {
   constructor(@Host() formDir: NgFormModel) { this.formDir = formDir; }
 
   get errorMessage(): string {
-    var control = (<ControlGroup>this.formDir.form).find(this.controlPath);
+    var form: ControlGroup = this.formDir.form;
+    var control = form.find(this.controlPath);
     if (isPresent(control) && control.touched) {
       for (var i = 0; i < this.errorTypes.length; ++i) {
         if (control.hasError(this.errorTypes[i])) {
diff --git a/modules/playground/src/order_management/index.ts b/modules/playground/src/order_management/index.ts
index 9b08e754c6..90bcf34987 100644
--- a/modules/playground/src/order_management/index.ts
+++ b/modules/playground/src/order_management/index.ts
@@ -66,7 +66,7 @@ class DataService {
   }
 
   itemsFor(order: Order): OrderItem[] {
-    return ListWrapper.filter(this.orderItems, i => i.orderId === order.orderId);
+    return this.orderItems.filter(i => i.orderId === order.orderId);
   }
 
   addItemForOrder(order: Order): void {
diff --git a/modules/playground/src/routing/inbox-app.ts b/modules/playground/src/routing/inbox-app.ts
index 0468410c9b..90073315e6 100644
--- a/modules/playground/src/routing/inbox-app.ts
+++ b/modules/playground/src/routing/inbox-app.ts
@@ -66,15 +66,14 @@ class DbService {
   }
 
   drafts(): Promise<any[]> {
-    return PromiseWrapper.then(this.getData(), (data) => {
-      return ListWrapper.filter(data,
-                                (record => isPresent(record['draft']) && record['draft'] == true));
+    return PromiseWrapper.then(this.getData(), (data: any[]) => {
+      return data.filter(record => isPresent(record['draft']) && record['draft'] == true);
     });
   }
 
   emails(): Promise<any[]> {
-    return PromiseWrapper.then(this.getData(), (data) => {
-      return ListWrapper.filter(data, (record => !isPresent(record['draft'])));
+    return PromiseWrapper.then(this.getData(), (data: any[]) => {
+      return data.filter(record => !isPresent(record['draft']));
     });
   }
 
diff --git a/modules/playground/src/template_driven_forms/index.ts b/modules/playground/src/template_driven_forms/index.ts
index 7e6c6f1514..ab1004c4ba 100644
--- a/modules/playground/src/template_driven_forms/index.ts
+++ b/modules/playground/src/template_driven_forms/index.ts
@@ -1,5 +1,6 @@
 import {bootstrap} from 'angular2/bootstrap';
 import {
+  ControlGroup,
   NgIf,
   NgFor,
   Component,
@@ -11,7 +12,6 @@ import {
   Provider,
   FORM_DIRECTIVES,
   NgControl,
-  ControlGroup,
   Validators,
   NgForm
 } from 'angular2/core';
@@ -81,7 +81,8 @@ class ShowError {
   constructor(@Host() formDir: NgForm) { this.formDir = formDir; }
 
   get errorMessage(): string {
-    var control = (<ControlGroup>this.formDir.form).find(this.controlPath);
+    var form: ControlGroup = this.formDir.form;
+    var control = form.find(this.controlPath);
     if (isPresent(control) && control.touched) {
       for (var i = 0; i < this.errorTypes.length; ++i) {
         if (control.hasError(this.errorTypes[i])) {
diff --git a/modules/playground/src/todo/services/TodoStore.ts b/modules/playground/src/todo/services/TodoStore.ts
index 77a4cebd3b..388706822d 100644
--- a/modules/playground/src/todo/services/TodoStore.ts
+++ b/modules/playground/src/todo/services/TodoStore.ts
@@ -31,7 +31,7 @@ export class Store {
   remove(record: KeyModel): void { this._spliceOut(record); }
 
   removeBy(callback: Predicate<KeyModel>): void {
-    var records = ListWrapper.filter(this.list, callback);
+    var records = this.list.filter(callback);
     ListWrapper.removeAll(this.list, records);
   }
 
diff --git a/modules/playground/src/web_workers/todo/services/TodoStore.ts b/modules/playground/src/web_workers/todo/services/TodoStore.ts
index 6624a0f969..792a4b691c 100644
--- a/modules/playground/src/web_workers/todo/services/TodoStore.ts
+++ b/modules/playground/src/web_workers/todo/services/TodoStore.ts
@@ -35,7 +35,7 @@ export class Store {
   remove(record: KeyModel): void { this._spliceOut(record); }
 
   removeBy(callback: Predicate<KeyModel>): void {
-    var records = ListWrapper.filter(this.list, callback);
+    var records = this.list.filter(callback);
     ListWrapper.removeAll(this.list, records);
   }