diff --git a/pkg/analyzer/lib/src/dart/element/element.dart b/pkg/analyzer/lib/src/dart/element/element.dart
index 549e1bc..c998b6a 100644
--- a/pkg/analyzer/lib/src/dart/element/element.dart
+++ b/pkg/analyzer/lib/src/dart/element/element.dart
@@ -949,7 +949,7 @@
   static ConstructorElement? getNamedConstructorFromList(
       String name, List<ConstructorElement> constructors) {
     if (name == 'new') {
-      // An unnamed constructor declared with `C.new(` is modeled as unnamed.
+      // A constructor declared as `C.new` is unnamed, and is modeled as such.
       name = '';
     }
     for (ConstructorElement element in constructors) {
diff --git a/pkg/analyzer/lib/src/generated/testing/element_factory.dart b/pkg/analyzer/lib/src/generated/testing/element_factory.dart
index ed9b4f8..cdf06145 100644
--- a/pkg/analyzer/lib/src/generated/testing/element_factory.dart
+++ b/pkg/analyzer/lib/src/generated/testing/element_factory.dart
@@ -107,7 +107,7 @@
       ClassElement definingClass, String? name, bool isConst,
       [List<DartType> argumentTypes = const []]) {
     var offset = name == null ? -1 : 0;
-    // An unnamed constructor declared with `C.new(` is modeled as unnamed.
+    // A constructor declared as `C.new` is unnamed, and is modeled as such.
     var constructor = name == null || name == 'new'
         ? ConstructorElementImpl('', offset)
         : ConstructorElementImpl(name, offset);
diff --git a/pkg/analyzer/lib/src/summary2/element_builder.dart b/pkg/analyzer/lib/src/summary2/element_builder.dart
index b5b366b..8f9bd66 100644
--- a/pkg/analyzer/lib/src/summary2/element_builder.dart
+++ b/pkg/analyzer/lib/src/summary2/element_builder.dart
@@ -173,7 +173,7 @@
     var nameNode = node.name ?? node.returnType;
     var name = node.name?.name ?? '';
     if (name == 'new') {
-      // An unnamed constructor declared with `C.new(` is modeled as unnamed.
+      // A constructor declared as `C.new` is unnamed, and is modeled as such.
       name = '';
     }
     var nameOffset = nameNode.offset;
diff --git a/pkg/compiler/lib/src/js_backend/annotations.dart b/pkg/compiler/lib/src/js_backend/annotations.dart
index f702ca37..98ebf0c 100644
--- a/pkg/compiler/lib/src/js_backend/annotations.dart
+++ b/pkg/compiler/lib/src/js_backend/annotations.dart
@@ -265,15 +265,15 @@
   /// Serializes this [AnnotationsData] to [sink].
   void writeToDataSink(DataSink sink);
 
-  /// Returns `true` if [member] has an `@pragma('dart2js:assumeDynamic')` annotation.
+  /// Returns `true` if [member] has an `@pragma('dart2js:assumeDynamic')`
+  /// annotation.
   bool hasAssumeDynamic(MemberEntity member);
 
-  /// Returns `true` if [member] has a `@pragma('dart2js:noInline')`, or
-  /// `@pragma('dart2js:noInline')` annotation.
+  /// Returns `true` if [member] has a `@pragma('dart2js:noInline')` annotation.
   bool hasNoInline(MemberEntity member);
 
-  /// Returns `true` if [member] has a `@pragma('dart2js:tryInline')`, or
-  /// `@pragma('dart2js:tryInline')` annotation.
+  /// Returns `true` if [member] has a `@pragma('dart2js:tryInline')`
+  /// annotation.
   bool hasTryInline(MemberEntity member);
 
   /// Returns `true` if [member] has a `@pragma('dart2js:disableFinal')`
@@ -284,18 +284,19 @@
   /// annotation.
   bool hasNoElision(MemberEntity member);
 
-  /// Returns `true` if [member] has a `@NoThrows()` annotation.
+  /// Returns `true` if [member] has a `@pragma('dart2js:noThrows')` annotation.
   bool hasNoThrows(MemberEntity member);
 
-  /// Returns `true` if [member] has a `@NoSideEffects()` annotation.
+  /// Returns `true` if [member] has a `@pragma('dart2js:noSideEffects')`
+  /// annotation.
   bool hasNoSideEffects(MemberEntity member);
 
-  /// Calls [f] for all functions with a `@pragma('dart2js:noInline')`, or
-  /// `@pragma('dart2js:noInline')` annotation.
+  /// Calls [f] for all functions with a `@pragma('dart2js:noInline')`
+  /// annotation.
   void forEachNoInline(void f(FunctionEntity function));
 
-  /// Calls [f] for all functions with a `@pragma('dart2js:tryInline')`, or
-  /// `@pragma('dart2js:tryInline')` annotation.
+  /// Calls [f] for all functions with a `@pragma('dart2js:tryInline')`
+  /// annotation.
   void forEachTryInline(void f(FunctionEntity function));
 
   /// Calls [f] for all functions with a `@pragma('dart2js:noThrows')`
diff --git a/runtime/lib/function.cc b/runtime/lib/function.cc
index eebce6d..785e713 100644
--- a/runtime/lib/function.cc
+++ b/runtime/lib/function.cc
@@ -48,7 +48,7 @@
            Function::Handle(other_closure.function()).IsGeneric());
     return false;
   }
-  // Closures that are not implicit instance closures are unique.
+  // Closures that are not implicit closures (tear-offs) are unique.
   const auto& func_a = Function::Handle(zone, receiver.function());
   if (!func_a.IsImplicitClosureFunction()) {
     return false;
diff --git a/sdk/lib/_internal/js_dev_runtime/patch/collection_patch.dart b/sdk/lib/_internal/js_dev_runtime/patch/collection_patch.dart
index 1f585c1..41ac9d6 100644
--- a/sdk/lib/_internal/js_dev_runtime/patch/collection_patch.dart
+++ b/sdk/lib/_internal/js_dev_runtime/patch/collection_patch.dart
@@ -8,9 +8,6 @@
 import 'dart:_interceptors' show JSArray;
 import 'dart:_js_helper'
     show
-        NoInline,
-        NoSideEffects,
-        NoThrows,
         patch,
         LinkedMap,
         IdentityMap,
diff --git a/sdk/lib/_internal/js_dev_runtime/patch/core_patch.dart b/sdk/lib/_internal/js_dev_runtime/patch/core_patch.dart
index 148016d..e07844b 100644
--- a/sdk/lib/_internal/js_dev_runtime/patch/core_patch.dart
+++ b/sdk/lib/_internal/js_dev_runtime/patch/core_patch.dart
@@ -12,7 +12,6 @@
         getRuntimeType,
         LinkedMap,
         JSSyntaxRegExp,
-        NoInline,
         notNull,
         nullCheck,
         Primitives,
@@ -903,7 +902,6 @@
 @patch
 class StackTrace {
   @patch
-  @NoInline()
   static StackTrace get current {
     return dart.stackTrace(JS('', 'Error()'));
   }
diff --git a/sdk/lib/_internal/js_dev_runtime/private/annotations.dart b/sdk/lib/_internal/js_dev_runtime/private/annotations.dart
index 9062f31..b2bc4b7 100644
--- a/sdk/lib/_internal/js_dev_runtime/private/annotations.dart
+++ b/sdk/lib/_internal/js_dev_runtime/private/annotations.dart
@@ -59,17 +59,6 @@
 /// of a variable with null
 const nullCheck = _NullCheck();
 
-/// Tells the optimizing compiler that the annotated method cannot throw.
-/// Requires @NoInline() to function correctly.
-class NoThrows {
-  const NoThrows();
-}
-
-/// Tells the optimizing compiler to not inline the annotated method.
-class NoInline {
-  const NoInline();
-}
-
 /// Marks a class as native and defines its JavaScript name(s).
 class Native {
   final String name;
diff --git a/sdk/lib/_internal/js_dev_runtime/private/js_helper.dart b/sdk/lib/_internal/js_dev_runtime/private/js_helper.dart
index 08a1e1e..c32af9b 100644
--- a/sdk/lib/_internal/js_dev_runtime/private/js_helper.dart
+++ b/sdk/lib/_internal/js_dev_runtime/private/js_helper.dart
@@ -479,7 +479,6 @@
  * Diagnoses an indexing error. Returns the ArgumentError or RangeError that
  * describes the problem.
  */
-@NoInline()
 Error diagnoseIndexError(indexable, int index) {
   int length = indexable.length;
   // The following returns the same error that would be thrown by calling
@@ -495,7 +494,6 @@
  * Diagnoses a range error. Returns the ArgumentError or RangeError that
  * describes the problem.
  */
-@NoInline()
 Error diagnoseRangeError(int? start, int? end, int length) {
   if (start == null) {
     return ArgumentError.value(start, 'start');
@@ -517,7 +515,6 @@
     JS<int>('!', r'#.lastIndexOf(#, #)', receiver, element, start);
 
 /// 'factory' for constructing ArgumentError.value to keep the call sites small.
-@NoInline()
 ArgumentError argumentErrorValue(object) {
   return ArgumentError.value(object);
 }
@@ -539,7 +536,6 @@
   throw AbstractClassInstantiationError(className);
 }
 
-@NoInline()
 throwConcurrentModificationError(collection) {
   throw ConcurrentModificationError(collection);
 }
diff --git a/sdk/lib/_internal/js_runtime/lib/collection_patch.dart b/sdk/lib/_internal/js_runtime/lib/collection_patch.dart
index 6ff4a1f..b01ebb6 100644
--- a/sdk/lib/_internal/js_runtime/lib/collection_patch.dart
+++ b/sdk/lib/_internal/js_runtime/lib/collection_patch.dart
@@ -9,9 +9,6 @@
         fillLiteralMap,
         fillLiteralSet,
         InternalMap,
-        NoInline,
-        NoSideEffects,
-        NoThrows,
         patch,
         JsLinkedHashMap,
         LinkedHashMapCell,
diff --git a/sdk/lib/_internal/js_runtime/lib/core_patch.dart b/sdk/lib/_internal/js_runtime/lib/core_patch.dart
index abd63e2..5726f96 100644
--- a/sdk/lib/_internal/js_runtime/lib/core_patch.dart
+++ b/sdk/lib/_internal/js_runtime/lib/core_patch.dart
@@ -17,7 +17,6 @@
         JsLinkedHashMap,
         jsonEncodeNative,
         JSSyntaxRegExp,
-        NoInline,
         objectHashCode,
         patch,
         Primitives,
diff --git a/sdk/lib/_internal/js_runtime/lib/dart2js_runtime_metrics.dart b/sdk/lib/_internal/js_runtime/lib/dart2js_runtime_metrics.dart
index ab1d879..637d2c7 100644
--- a/sdk/lib/_internal/js_runtime/lib/dart2js_runtime_metrics.dart
+++ b/sdk/lib/_internal/js_runtime/lib/dart2js_runtime_metrics.dart
@@ -16,12 +16,17 @@
 ///
 /// - `runtime`: `'dart2js'`
 ///
-/// - `firstMs`:  first performance.now() reading in the main.dart.js file.
+/// - `firstMs`: First `performance.now()` reading taken from the main.dart.js
+///   file. This is the earliest time that the script is executing. The script
+///   has already been loaded and parsed (otherwise the script load would fail)
+///   and these earier events may be available from the `performance` API.
 ///
-/// - `dartMainProgramMs`: performance.now() immediately inside the function
-///    wrapping all the Dart code
+/// - `dartProgramMs`: `performance.now()` immediately inside the large function
+///   with the name 'dartProgram' that wraps all the Dart code, before doing any
+///   program setup actions.
 ///
-/// - `callMainMs`: performance.now() just before calling main()
+/// - `callMainMs`: performance.now() just before calling main(), after doing
+///   all program setup actions.
 ///
 /// The injected code uses `Date.now()` if `performance.now()` is not defined.
 Map<String, Object> get startupMetrics {
diff --git a/sdk/lib/_internal/js_runtime/lib/developer_patch.dart b/sdk/lib/_internal/js_runtime/lib/developer_patch.dart
index e7833f5..feb0d48 100644
--- a/sdk/lib/_internal/js_runtime/lib/developer_patch.dart
+++ b/sdk/lib/_internal/js_runtime/lib/developer_patch.dart
@@ -4,7 +4,7 @@
 
 // Patch file for dart:developer library.
 
-import 'dart:_js_helper' show patch, ForceInline;
+import 'dart:_js_helper' show patch;
 import 'dart:_foreign_helper' show JS;
 import 'dart:async' show Zone;
 import 'dart:isolate';
diff --git a/sdk/lib/_internal/js_runtime/lib/interceptors.dart b/sdk/lib/_internal/js_runtime/lib/interceptors.dart
index 189bb8c..5a062ab 100644
--- a/sdk/lib/_internal/js_runtime/lib/interceptors.dart
+++ b/sdk/lib/_internal/js_runtime/lib/interceptors.dart
@@ -40,8 +40,7 @@
         throwConcurrentModificationError,
         lookupAndCacheInterceptor,
         StringMatch,
-        firstMatchAfter,
-        NoInline;
+        firstMatchAfter;
 
 import 'dart:_foreign_helper'
     show
diff --git a/sdk/lib/html/dart2js/html_dart2js.dart b/sdk/lib/html/dart2js/html_dart2js.dart
index 15695c1..50660b9 100644
--- a/sdk/lib/html/dart2js/html_dart2js.dart
+++ b/sdk/lib/html/dart2js/html_dart2js.dart
@@ -50,7 +50,6 @@
         JSName,
         Native,
         Returns,
-        ForceInline,
         findDispatchTagForInterceptorClass,
         setNativeSubclassDispatchRecord,
         makeLeafDispatchRecord,
diff --git a/tests/lib/html/js_dispatch_property_test.dart b/tests/lib/html/js_dispatch_property_test.dart
index 3fbe2ea..f20a4ffa6 100644
--- a/tests/lib/html/js_dispatch_property_test.dart
+++ b/tests/lib/html/js_dispatch_property_test.dart
@@ -6,8 +6,6 @@
 
 import 'package:expect/minitest.dart';
 
-import 'package:expect/expect.dart' show NoInline, AssumeDynamic;
-
 import 'js_dispatch_property_test_lib.dart';
 
 @pragma('dart2js:noInline')
diff --git a/tests/lib/html/js_interop_constructor_name/util.dart b/tests/lib/html/js_interop_constructor_name/util.dart
index 03659f0..3ec4563 100644
--- a/tests/lib/html/js_interop_constructor_name/util.dart
+++ b/tests/lib/html/js_interop_constructor_name/util.dart
@@ -5,7 +5,6 @@
 @JS()
 library util;
 
-import 'package:expect/expect.dart' show NoInline, AssumeDynamic;
 import 'package:js/js.dart';
 
 @JS()
diff --git a/tests/lib/html/js_typed_interop_callable_object_test.dart b/tests/lib/html/js_typed_interop_callable_object_test.dart
index 659d2a91..663a789 100644
--- a/tests/lib/html/js_typed_interop_callable_object_test.dart
+++ b/tests/lib/html/js_typed_interop_callable_object_test.dart
@@ -7,7 +7,6 @@
 
 import 'dart:html';
 
-import 'package:expect/expect.dart' show NoInline, AssumeDynamic;
 import 'package:js/js.dart';
 import 'package:expect/minitest.dart';
 
diff --git a/tests/lib_2/html/js_dispatch_property_test.dart b/tests/lib_2/html/js_dispatch_property_test.dart
index 3ca4a9e..866b7e6 100644
--- a/tests/lib_2/html/js_dispatch_property_test.dart
+++ b/tests/lib_2/html/js_dispatch_property_test.dart
@@ -8,8 +8,6 @@
 
 import 'package:expect/minitest.dart';
 
-import 'package:expect/expect.dart' show NoInline, AssumeDynamic;
-
 import 'js_dispatch_property_test_lib.dart';
 
 @pragma('dart2js:noInline')
diff --git a/tests/lib_2/html/js_interop_constructor_name/util.dart b/tests/lib_2/html/js_interop_constructor_name/util.dart
index 6eecab4..c98f612 100644
--- a/tests/lib_2/html/js_interop_constructor_name/util.dart
+++ b/tests/lib_2/html/js_interop_constructor_name/util.dart
@@ -7,7 +7,6 @@
 @JS()
 library util;
 
-import 'package:expect/expect.dart' show NoInline, AssumeDynamic;
 import 'package:js/js.dart';
 
 @JS()
diff --git a/tests/lib_2/html/js_typed_interop_callable_object_test.dart b/tests/lib_2/html/js_typed_interop_callable_object_test.dart
index 1a89ff6..9ede0a2 100644
--- a/tests/lib_2/html/js_typed_interop_callable_object_test.dart
+++ b/tests/lib_2/html/js_typed_interop_callable_object_test.dart
@@ -9,7 +9,6 @@
 
 import 'dart:html';
 
-import 'package:expect/expect.dart' show NoInline, AssumeDynamic;
 import 'package:js/js.dart';
 import 'package:expect/minitest.dart';
 
diff --git a/tests/web/deferred_inheritance_test.dart b/tests/web/deferred_inheritance_test.dart
index 2443682..45a62fa 100644
--- a/tests/web/deferred_inheritance_test.dart
+++ b/tests/web/deferred_inheritance_test.dart
@@ -16,7 +16,7 @@
 class B extends A {}
 
 /// If the check `y is A` is generated as `y.$isA` then the issue is not
-/// exposed. We use `AssumeDynamic` to ensure that we generate as `y instanceof
+/// exposed. We use `assumeDynamic` to ensure that we generate as `y instanceof
 /// A` in JS.
 @pragma('dart2js:noInline')
 @pragma('dart2js:assumeDynamic')
diff --git a/tests/web/internal/mock_libraries.dart b/tests/web/internal/mock_libraries.dart
index 9f0be35..d279e0c 100644
--- a/tests/web/internal/mock_libraries.dart
+++ b/tests/web/internal/mock_libraries.dart
@@ -246,10 +246,6 @@
   'listTypeCheck': 'listTypeCheck(value) {}',
   'makeLiteralMap': 'makeLiteralMap(List keyValuePairs) {}',
   'Native': 'class Native {}',
-  'NoInline': 'class NoInline {}',
-  'ForceInline': 'class ForceInline {}',
-  'NoSideEffects': 'class NoSideEffects {}',
-  'NoThrows': 'class NoThrows {}',
   'numberOrStringSuperNativeTypeCast':
       'numberOrStringSuperNativeTypeCast(value) {}',
   'numberOrStringSuperNativeTypeCheck':
diff --git a/tests/web/native/compiler_test_internals.dart b/tests/web/native/compiler_test_internals.dart
index 08e96d0..3278e34 100644
--- a/tests/web/native/compiler_test_internals.dart
+++ b/tests/web/native/compiler_test_internals.dart
@@ -4,6 +4,4 @@
 
 library compiler_test_internals;
 
-export 'dart:_js_helper' show NoSideEffects, NoThrows, NoInline;
-
 export 'dart:_foreign_helper' show JS;
diff --git a/tests/web_2/deferred_inheritance_test.dart b/tests/web_2/deferred_inheritance_test.dart
index 0373907..8f16b55 100644
--- a/tests/web_2/deferred_inheritance_test.dart
+++ b/tests/web_2/deferred_inheritance_test.dart
@@ -18,7 +18,7 @@
 class B extends A {}
 
 /// If the check `y is A` is generated as `y.$isA` then the issue is not
-/// exposed. We use `AssumeDynamic` to ensure that we generate as `y instanceof
+/// exposed. We use `assumeDynamic` to ensure that we generate as `y instanceof
 /// A` in JS.
 @pragma('dart2js:noInline')
 @pragma('dart2js:assumeDynamic')
diff --git a/tests/web_2/internal/mock_libraries.dart b/tests/web_2/internal/mock_libraries.dart
index adec88a..9aa36ad 100644
--- a/tests/web_2/internal/mock_libraries.dart
+++ b/tests/web_2/internal/mock_libraries.dart
@@ -218,10 +218,6 @@
   }''',
   'makeLiteralMap': 'makeLiteralMap(List keyValuePairs) {}',
   'Native': 'class Native {}',
-  'NoInline': 'class NoInline {}',
-  'ForceInline': 'class ForceInline {}',
-  'NoSideEffects': 'class NoSideEffects {}',
-  'NoThrows': 'class NoThrows {}',
   '_Patch': 'class _Patch { final tag; const _Patch(this.tag); }',
   'patch': 'const patch = const _Patch(null);',
   'patch_full': 'const patch_full = const _Patch("full");',
diff --git a/tests/web_2/native/compiler_test_internals.dart b/tests/web_2/native/compiler_test_internals.dart
index c7b0218..a0ce071 100644
--- a/tests/web_2/native/compiler_test_internals.dart
+++ b/tests/web_2/native/compiler_test_internals.dart
@@ -6,6 +6,4 @@
 
 library compiler_test_internals;
 
-export 'dart:_js_helper' show NoSideEffects, NoThrows, NoInline;
-
 export 'dart:_foreign_helper' show JS;
diff --git a/tools/VERSION b/tools/VERSION
index 2e10b12..8c5ab71 100644
--- a/tools/VERSION
+++ b/tools/VERSION
@@ -27,5 +27,5 @@
 MAJOR 2
 MINOR 14
 PATCH 0
-PRERELEASE 382
+PRERELEASE 383
 PRERELEASE_PATCH 0
\ No newline at end of file
diff --git a/tools/dom/templates/html/dart2js/html_dart2js.darttemplate b/tools/dom/templates/html/dart2js/html_dart2js.darttemplate
index fd4069b..1559461 100644
--- a/tools/dom/templates/html/dart2js/html_dart2js.darttemplate
+++ b/tools/dom/templates/html/dart2js/html_dart2js.darttemplate
@@ -42,7 +42,7 @@
 import 'dart:web_sql';
 import 'dart:_js_helper' show
     convertDartClosureToJS, Creates, JavaScriptIndexingBehavior,
-    JSName, Native, Returns, ForceInline,
+    JSName, Native, Returns,
     findDispatchTagForInterceptorClass, setNativeSubclassDispatchRecord,
     makeLeafDispatchRecord, registerGlobalObject, applyExtension;
 import 'dart:_interceptors' show