diff --git a/ci/licenses_golden/licenses_flutter b/ci/licenses_golden/licenses_flutter
index 14b2dbd8cd4a1..6b5b591b48f73 100644
--- a/ci/licenses_golden/licenses_flutter
+++ b/ci/licenses_golden/licenses_flutter
@@ -18,6 +18,7 @@ FILE: ../../../flutter/assets/directory_asset_bundle.h
 FILE: ../../../flutter/benchmarking/benchmarking.cc
 FILE: ../../../flutter/benchmarking/benchmarking.h
 FILE: ../../../flutter/common/exported_symbols.sym
+FILE: ../../../flutter/common/runtime.h
 FILE: ../../../flutter/common/settings.cc
 FILE: ../../../flutter/common/settings.h
 FILE: ../../../flutter/common/task_runners.cc
diff --git a/common/BUILD.gn b/common/BUILD.gn
index b9b05073501d2..69095bbcd45ab 100644
--- a/common/BUILD.gn
+++ b/common/BUILD.gn
@@ -10,6 +10,7 @@ config("flutter_config") {
 
 source_set("common") {
   sources = [
+    "runtime.h",
     "settings.cc",
     "settings.h",
     "task_runners.cc",
diff --git a/common/config.gni b/common/config.gni
index 1f0de0a71f89b..cfc4b15936d6a 100644
--- a/common/config.gni
+++ b/common/config.gni
@@ -21,7 +21,7 @@ if (is_ios || is_mac) {
 }
 
 declare_args() {
-  # The runtime mode ("debug", "profile", or "release")
+  # The runtime mode ("debug", "profile", "release", or "jit_release")
   flutter_runtime_mode = "debug"
 
   # Whether to use the Skia text shaper module
@@ -39,6 +39,7 @@ feature_defines_list = [
   "FLUTTER_RUNTIME_MODE_DEBUG=1",
   "FLUTTER_RUNTIME_MODE_PROFILE=2",
   "FLUTTER_RUNTIME_MODE_RELEASE=3",
+  "FLUTTER_RUNTIME_MODE_JIT_RELEASE=4",
 ]
 
 if (flutter_runtime_mode == "debug") {
@@ -47,6 +48,8 @@ if (flutter_runtime_mode == "debug") {
   feature_defines_list += [ "FLUTTER_RUNTIME_MODE=2" ]
 } else if (flutter_runtime_mode == "release") {
   feature_defines_list += [ "FLUTTER_RUNTIME_MODE=3" ]
+} else if (flutter_runtime_mode == "jit_release") {
+  feature_defines_list += [ "FLUTTER_RUNTIME_MODE=4" ]
 } else {
   feature_defines_list += [ "FLUTTER_RUNTIME_MODE=0" ]
 }
diff --git a/common/runtime.h b/common/runtime.h
new file mode 100644
index 0000000000000..096ffbd86f83a
--- /dev/null
+++ b/common/runtime.h
@@ -0,0 +1,15 @@
+// Copyright 2013 The Flutter Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+namespace flutter {
+
+#define FLUTTER_JIT_RUNTIME                                \
+  ((FLUTTER_RUNTIME_MODE == FLUTTER_RUNTIME_MODE_DEBUG) || \
+   (FLUTTER_RUNTIME_MODE == FLUTTER_RUNTIME_MODE_JIT_RELEASE))
+
+#define FLUTTER_RELEASE                                      \
+  ((FLUTTER_RUNTIME_MODE == FLUTTER_RUNTIME_MODE_RELEASE) || \
+   (FLUTTER_RUNTIME_MODE == FLUTTER_RUNTIME_MODE_JIT_RELEASE))
+
+}  // namespace flutter
diff --git a/flow/raster_cache.cc b/flow/raster_cache.cc
index 8e85f23444d08..433c4f3973784 100644
--- a/flow/raster_cache.cc
+++ b/flow/raster_cache.cc
@@ -6,6 +6,7 @@
 
 #include <vector>
 
+#include "flutter/common/runtime.h"
 #include "flutter/flow/layers/layer.h"
 #include "flutter/flow/paint_utils.h"
 #include "flutter/fml/logging.h"
@@ -265,7 +266,7 @@ void RasterCache::SetCheckboardCacheImages(bool checkerboard) {
 }
 
 void RasterCache::TraceStatsToTimeline() const {
-#if FLUTTER_RUNTIME_MODE != FLUTTER_RUNTIME_MODE_RELEASE
+#if !FLUTTER_RELEASE
 
   size_t layer_cache_count = 0;
   size_t layer_cache_bytes = 0;
@@ -292,7 +293,7 @@ void RasterCache::TraceStatsToTimeline() const {
                     "PictureMBytes", picture_cache_bytes * 1e-6  //
   );
 
-#endif  // FLUTTER_RUNTIME_MODE != FLUTTER_RUNTIME_MODE_RELEASE
+#endif  // !FLUTTER_RELEASE
 }
 
 }  // namespace flutter
diff --git a/lib/snapshot/BUILD.gn b/lib/snapshot/BUILD.gn
index 9968783208543..5a94265e05052 100644
--- a/lib/snapshot/BUILD.gn
+++ b/lib/snapshot/BUILD.gn
@@ -59,7 +59,8 @@ compiled_action("generate_snapshot_bin") {
   ]
 
   if (is_debug && flutter_runtime_mode != "profile" &&
-      flutter_runtime_mode != "release") {
+      flutter_runtime_mode != "release" &&
+      flutter_runtime_mode != "jit_release") {
     args += [ "--enable_asserts" ]
   }
 
@@ -261,7 +262,8 @@ compile_platform("strong_platform") {
     "$root_out_dir/flutter_patched_sdk/vm_outline_strong.dill",
   ]
 
-  is_runtime_mode_release = flutter_runtime_mode == "release"
+  is_runtime_mode_release =
+      flutter_runtime_mode == "release" || flutter_runtime_mode == "jit_release"
   allow_causal_async_stacks = !is_runtime_mode_release
   args = [
     "--target=flutter",
diff --git a/lib/ui/window/viewport_metrics.cc b/lib/ui/window/viewport_metrics.cc
index 44e42957e3a8f..f18972992189a 100644
--- a/lib/ui/window/viewport_metrics.cc
+++ b/lib/ui/window/viewport_metrics.cc
@@ -39,10 +39,6 @@ ViewportMetrics::ViewportMetrics(double p_device_pixel_ratio,
       physical_system_gesture_inset_bottom(
           p_physical_system_gesture_inset_bottom),
       physical_system_gesture_inset_left(p_physical_system_gesture_inset_left) {
-  // Ensure we don't have nonsensical dimensions.
-  FML_DCHECK(physical_width > 0);
-  FML_DCHECK(physical_height > 0);
-  FML_DCHECK(device_pixel_ratio > 0);
 }
 
 ViewportMetrics::ViewportMetrics(double p_device_pixel_ratio,
@@ -72,12 +68,7 @@ ViewportMetrics::ViewportMetrics(double p_device_pixel_ratio,
       physical_view_inset_bottom(p_physical_view_inset_bottom),
       physical_view_inset_left(p_physical_view_inset_left),
       physical_view_inset_front(p_physical_view_inset_front),
-      physical_view_inset_back(p_physical_view_inset_back) {
-  // Ensure we don't have nonsensical dimensions.
-  FML_DCHECK(physical_width > 0);
-  FML_DCHECK(physical_height > 0);
-  FML_DCHECK(device_pixel_ratio > 0);
-}
+      physical_view_inset_back(p_physical_view_inset_back) {}
 
 ViewportMetrics::ViewportMetrics(const ViewportMetrics& other) = default;
 
diff --git a/runtime/dart_snapshot.cc b/runtime/dart_snapshot.cc
index 8fe63c095feb9..acebcd3493d84 100644
--- a/runtime/dart_snapshot.cc
+++ b/runtime/dart_snapshot.cc
@@ -6,6 +6,7 @@
 
 #include <sstream>
 
+#include "flutter/common/runtime.h"
 #include "flutter/fml/native_library.h"
 #include "flutter/fml/paths.h"
 #include "flutter/fml/trace_event.h"
@@ -24,7 +25,7 @@ const char* DartSnapshot::kIsolateInstructionsSymbol =
 // data through symbols that are statically linked into the executable.
 // On other platforms this data is obtained by a dynamic symbol lookup.
 #define DART_SNAPSHOT_STATIC_LINK \
-  (OS_WIN || (OS_ANDROID && FLUTTER_RUNTIME_MODE == FLUTTER_RUNTIME_MODE_DEBUG))
+  (OS_WIN || (OS_ANDROID && FLUTTER_JIT_RUNTIME))
 
 #if !DART_SNAPSHOT_STATIC_LINK
 
diff --git a/runtime/dart_vm.cc b/runtime/dart_vm.cc
index 72d78c74e800d..55d081a189339 100644
--- a/runtime/dart_vm.cc
+++ b/runtime/dart_vm.cc
@@ -9,6 +9,7 @@
 #include <mutex>
 #include <vector>
 
+#include "flutter/common/runtime.h"
 #include "flutter/common/settings.h"
 #include "flutter/fml/compiler_specific.h"
 #include "flutter/fml/file.h"
@@ -39,7 +40,7 @@
 namespace dart {
 namespace observatory {
 
-#if !OS_FUCHSIA && (FLUTTER_RUNTIME_MODE != FLUTTER_RUNTIME_MODE_RELEASE)
+#if !OS_FUCHSIA && !FLUTTER_RELEASE
 
 // These two symbols are defined in |observatory_archive.cc| which is generated
 // by the |//third_party/dart/runtime/observatory:archive_observatory| rule.
@@ -48,8 +49,7 @@ namespace observatory {
 extern unsigned int observatory_assets_archive_len;
 extern const uint8_t* observatory_assets_archive;
 
-#endif  // !OS_FUCHSIA && (FLUTTER_RUNTIME_MODE !=
-        // FLUTTER_RUNTIME_MODE_RELEASE)
+#endif  // !OS_FUCHSIA && !FLUTTER_RELEASE
 
 }  // namespace observatory
 }  // namespace dart
@@ -148,7 +148,7 @@ bool DartFileModifiedCallback(const char* source_url, int64_t since_ms) {
 void ThreadExitCallback() {}
 
 Dart_Handle GetVMServiceAssetsArchiveCallback() {
-#if (FLUTTER_RUNTIME_MODE == FLUTTER_RUNTIME_MODE_RELEASE)
+#if FLUTTER_RELEASE
   return nullptr;
 #elif OS_FUCHSIA
   fml::UniqueFD fd = fml::OpenFile("pkg/data/observatory.tar", false,
diff --git a/shell/common/shell.cc b/shell/common/shell.cc
index 38ee3f50dcfe1..c22478680b945 100644
--- a/shell/common/shell.cc
+++ b/shell/common/shell.cc
@@ -10,6 +10,7 @@
 #include <vector>
 
 #include "flutter/assets/directory_asset_bundle.h"
+#include "flutter/common/runtime.h"
 #include "flutter/fml/file.h"
 #include "flutter/fml/icu_util.h"
 #include "flutter/fml/log_settings.h"
@@ -1049,7 +1050,7 @@ void Shell::OnFrameRasterized(const FrameTiming& timing) {
     first_frame_rasterized_ = true;
     ReportTimings();
   } else if (!frame_timings_report_scheduled_) {
-#if FLUTTER_RUNTIME_MODE == FLUTTER_RUNTIME_MODE_RELEASE
+#if FLUTTER_RELEASE
     constexpr int kBatchTimeInMilliseconds = 1000;
 #else
     constexpr int kBatchTimeInMilliseconds = 100;
diff --git a/shell/common/shell_unittests.cc b/shell/common/shell_unittests.cc
index c1160b92643f9..6968cf72994a4 100644
--- a/shell/common/shell_unittests.cc
+++ b/shell/common/shell_unittests.cc
@@ -8,6 +8,7 @@
 #include <future>
 #include <memory>
 
+#include "flutter/common/runtime.h"
 #include "flutter/flow/layers/layer_tree.h"
 #include "flutter/flow/layers/transform_layer.h"
 #include "flutter/fml/command_line.h"
@@ -207,6 +208,10 @@ TEST(ShellTestNoFixture, EnableMirrorsIsWhitelisted) {
     GTEST_SKIP();
     return;
   }
+#if FLUTTER_RELEASE
+  GTEST_SKIP();
+  return;
+#endif
 
   const std::vector<fml::CommandLine::Option> options = {
       fml::CommandLine::Option("dart-flags", "--enable_mirrors")};
@@ -223,7 +228,7 @@ TEST_F(ShellTest, BlacklistedDartVMFlag) {
       fml::CommandLine::Option("dart-flags", "--verify_after_gc")};
   fml::CommandLine command_line("", options, std::vector<std::string>());
 
-#if FLUTTER_RUNTIME_MODE != FLUTTER_RUNTIME_MODE_RELEASE
+#if !FLUTTER_RELEASE
   // Upon encountering a non-whitelisted Dart flag the process terminates.
   const char* expected =
       "Encountered blacklisted Dart VM flag: --verify_after_gc";
@@ -241,7 +246,7 @@ TEST_F(ShellTest, WhitelistedDartVMFlag) {
   fml::CommandLine command_line("", options, std::vector<std::string>());
   flutter::Settings settings = flutter::SettingsFromCommandLine(command_line);
 
-#if FLUTTER_RUNTIME_MODE != FLUTTER_RUNTIME_MODE_RELEASE
+#if !FLUTTER_RELEASE
   EXPECT_EQ(settings.dart_flags.size(), 2u);
   EXPECT_EQ(settings.dart_flags[0], "--max_profile_depth 1");
   EXPECT_EQ(settings.dart_flags[1], "--random_seed 42");
@@ -433,7 +438,7 @@ TEST(SettingsTest, FrameTimingSetsAndGetsProperly) {
   }
 }
 
-#if FLUTTER_RUNTIME_MODE == FLUTTER_RUNTIME_MODE_RELEASE
+#if FLUTTER_RELEASE
 TEST_F(ShellTest, ReportTimingsIsCalledLaterInReleaseMode) {
 #else
 TEST_F(ShellTest, ReportTimingsIsCalledSoonerInNonReleaseMode) {
@@ -473,7 +478,7 @@ TEST_F(ShellTest, ReportTimingsIsCalledSoonerInNonReleaseMode) {
   fml::TimePoint finish = fml::TimePoint::Now();
   fml::TimeDelta ellapsed = finish - start;
 
-#if FLUTTER_RUNTIME_MODE == FLUTTER_RUNTIME_MODE_RELEASE
+#if FLUTTER_RELEASE
   // Our batch time is 1000ms. Hopefully the 800ms limit is relaxed enough to
   // make it not too flaky.
   ASSERT_TRUE(ellapsed >= fml::TimeDelta::FromMilliseconds(800));
diff --git a/shell/common/switches.cc b/shell/common/switches.cc
index 7396df7fa907b..ec275b36a475c 100644
--- a/shell/common/switches.cc
+++ b/shell/common/switches.cc
@@ -9,6 +9,7 @@
 #include <sstream>
 #include <string>
 
+#include "flutter/common/runtime.h"
 #include "flutter/fml/native_library.h"
 #include "flutter/fml/paths.h"
 #include "flutter/fml/size.h"
@@ -36,7 +37,7 @@ struct SwitchDesc {
 #define DEF_SWITCHES_END };
 // clang-format on
 
-#if FLUTTER_RUNTIME_MODE != FLUTTER_RUNTIME_MODE_RELEASE
+#if !FLUTTER_RELEASE
 
 // List of common and safe VM flags to allow to be passed directly to the VM.
 // clang-format off
@@ -134,7 +135,7 @@ const std::string_view FlagForSwitch(Switch swtch) {
   return std::string_view();
 }
 
-#if FLUTTER_RUNTIME_MODE != FLUTTER_RUNTIME_MODE_RELEASE
+#if !FLUTTER_RELEASE
 
 static bool IsWhitelistedDartVMFlag(const std::string& flag) {
   for (uint32_t i = 0; i < fml::size(gDartFlagsWhitelist); ++i) {
@@ -328,7 +329,7 @@ Settings SettingsFromCommandLine(const fml::CommandLine& command_line) {
   settings.use_test_fonts =
       command_line.HasOption(FlagForSwitch(Switch::UseTestFonts));
 
-#if FLUTTER_RUNTIME_MODE != FLUTTER_RUNTIME_MODE_RELEASE
+#if !FLUTTER_RELEASE
   command_line.GetOptionValue(FlagForSwitch(Switch::LogTag), &settings.log_tag);
   std::string all_dart_flags;
   if (command_line.GetOptionValue(FlagForSwitch(Switch::DartFlags),
diff --git a/shell/platform/android/io/flutter/view/FlutterMain.java b/shell/platform/android/io/flutter/view/FlutterMain.java
index 1d1c08d2bb3af..5e1d00b132ba1 100644
--- a/shell/platform/android/io/flutter/view/FlutterMain.java
+++ b/shell/platform/android/io/flutter/view/FlutterMain.java
@@ -186,7 +186,7 @@ public static void ensureInitializationComplete(@NonNull Context applicationCont
             }
 
             String kernelPath = null;
-            if (BuildConfig.DEBUG) {
+            if (BuildConfig.DEBUG || BuildConfig.JIT_RELEASE) {
                 String snapshotAssetPath = PathUtils.getDataDirectory(applicationContext) + File.separator + sFlutterAssetsDir;
                 kernelPath = snapshotAssetPath + File.separator + DEFAULT_KERNEL_BLOB;
                 shellArgs.add("--" + SNAPSHOT_ASSET_PATH_KEY + "=" + snapshotAssetPath);
@@ -297,7 +297,7 @@ private static void initConfig(@NonNull Context applicationContext) {
     private static void initResources(@NonNull Context applicationContext) {
         new ResourceCleaner(applicationContext).start();
 
-        if (BuildConfig.DEBUG) {
+        if (BuildConfig.DEBUG || BuildConfig.JIT_RELEASE) {
             final String dataDirPath = PathUtils.getDataDirectory(applicationContext);
             final String packageName = applicationContext.getPackageName();
             final PackageManager packageManager = applicationContext.getPackageManager();
diff --git a/shell/platform/fuchsia/runtime/dart/utils/BUILD.gn b/shell/platform/fuchsia/runtime/dart/utils/BUILD.gn
index b1c94a762da59..1dca94e3c2acd 100644
--- a/shell/platform/fuchsia/runtime/dart/utils/BUILD.gn
+++ b/shell/platform/fuchsia/runtime/dart/utils/BUILD.gn
@@ -34,10 +34,10 @@ source_set("utils") {
     "$fuchsia_sdk_root/pkg:async-loop-default",
     "$fuchsia_sdk_root/pkg:fdio",
     "$fuchsia_sdk_root/pkg:memfs",
-    "$fuchsia_sdk_root/pkg:syslog",
-    "$fuchsia_sdk_root/pkg:zx",
     "$fuchsia_sdk_root/pkg:sys_cpp",
+    "$fuchsia_sdk_root/pkg:syslog",
     "$fuchsia_sdk_root/pkg:vfs_cpp",
+    "$fuchsia_sdk_root/pkg:zx",
     "//third_party/tonic",
   ]
 
diff --git a/testing/testing.gni b/testing/testing.gni
index 30c6c715518cb..7de912ca9032a 100644
--- a/testing/testing.gni
+++ b/testing/testing.gni
@@ -87,7 +87,8 @@ template("dart_snapshot_kernel") {
       rebase_path(snapshot_depfile),
     ]
 
-    if (flutter_runtime_mode == "release") {
+    if (flutter_runtime_mode == "release" ||
+        flutter_runtime_mode == "jit_release") {
       args += [ "-Ddart.vm.product=true" ]
     }
 
diff --git a/tools/gen_android_buildconfig.py b/tools/gen_android_buildconfig.py
index 648ec8a59293a..f54c8723e914c 100644
--- a/tools/gen_android_buildconfig.py
+++ b/tools/gen_android_buildconfig.py
@@ -23,6 +23,7 @@
   public final static boolean DEBUG = {0};
   public final static boolean PROFILE = {1};
   public final static boolean RELEASE = {2};
+  public final static boolean JIT_RELEASE = {3};
 }}
 """
 
@@ -33,13 +34,14 @@ def main():
 
   args = parser.parse_args()
 
-  release ='release' in args.runtime_mode.lower()
-  profile = not release and 'profile' in args.runtime_mode.lower()
-  debug = not release and not profile and 'debug' in args.runtime_mode.lower()
-  assert debug or profile or release
+  jit_release = 'jit_release' in args.runtime_mode.lower()
+  release = not jit_release and 'release' in args.runtime_mode.lower()
+  profile = 'profile' in args.runtime_mode.lower()
+  debug = 'debug' in args.runtime_mode.lower()
+  assert debug or profile or release or jit_release
 
   with open(os.path.abspath(args.out), 'w+') as output_file:
-    output_file.write(BUILD_CONFIG_TEMPLATE.format(str(debug).lower(), str(profile).lower(), str(release).lower()))
+    output_file.write(BUILD_CONFIG_TEMPLATE.format(str(debug).lower(), str(profile).lower(), str(release).lower(), str(jit_release).lower()))
 
 if __name__ == '__main__':
   sys.exit(main())
diff --git a/tools/gn b/tools/gn
index 6e0992ee623f4..b49f203db0f7e 100755
--- a/tools/gn
+++ b/tools/gn
@@ -17,8 +17,6 @@ def get_out_dir(args):
         target_dir = ['host']
 
     runtime_mode = args.runtime_mode
-    if args.dynamic and runtime_mode in ['profile', 'release']:
-        target_dir.append('dynamic')
 
     target_dir.append(args.runtime_mode)
 
@@ -81,8 +79,6 @@ def to_gn_args(args):
       raise Exception('--enable-metal is only supported on iOS')
 
     runtime_mode = args.runtime_mode
-    if args.dynamic and runtime_mode in ['profile', 'release']:
-      runtime_mode = 'dynamic_' + runtime_mode
 
     gn_args = {}
 
@@ -148,10 +144,8 @@ def to_gn_args(args):
 
     if runtime_mode == 'debug':
         gn_args['dart_runtime_mode'] = 'develop'
-    elif runtime_mode == 'dynamic_profile':
-        gn_args['dart_runtime_mode'] = 'profile'
-    elif runtime_mode == 'dynamic_release':
-        gn_args['dart_runtime_mode'] = 'release'
+    elif runtime_mode == 'jit_release':
+        gn_args['dart_runtime_mode'] = 'release';
     else:
         gn_args['dart_runtime_mode'] = runtime_mode
 
@@ -271,8 +265,7 @@ def parse_args(args):
 
   parser.add_argument('--unoptimized', default=False, action='store_true')
 
-  parser.add_argument('--runtime-mode', type=str, choices=['debug', 'profile', 'release'], default='debug')
-  parser.add_argument('--dynamic', default=False, action='store_true')
+  parser.add_argument('--runtime-mode', type=str, choices=['debug', 'profile', 'release', 'jit_release'], default='debug')
   parser.add_argument('--interpreter', default=False, action='store_true')
   parser.add_argument('--dart-debug', default=False, action='store_true', help='Enables assertsion in the Dart VM. ' +
       'Does not affect optimization levels. If you need to disable optimizations in Dart, use --full-dart-debug')