diff --git a/packages/SystemUI/aconfig/systemui.aconfig b/packages/SystemUI/aconfig/systemui.aconfig
index 407873e..c2072ac 100644
--- a/packages/SystemUI/aconfig/systemui.aconfig
+++ b/packages/SystemUI/aconfig/systemui.aconfig
@@ -429,3 +429,14 @@
        purpose: PURPOSE_BUGFIX
      }
 }
+
+flag {
+    name: "update_user_switcher_background"
+    namespace: "systemui"
+    description: "Decide whether to update user switcher in background thread."
+    bug: "322745650"
+    metadata {
+        purpose: PURPOSE_BUGFIX
+    }
+}
+
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/KeyguardStatusBarViewController.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/KeyguardStatusBarViewController.java
index 2206be5..38b3718 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/KeyguardStatusBarViewController.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/KeyguardStatusBarViewController.java
@@ -20,6 +20,7 @@
 import static android.app.StatusBarManager.DISABLE_SYSTEM_INFO;
 
 import static com.android.systemui.statusbar.StatusBarState.KEYGUARD;
+import static com.android.systemui.Flags.updateUserSwitcherBackground;
 
 import android.content.res.Configuration;
 import android.content.res.Resources;
@@ -43,6 +44,7 @@
 import com.android.keyguard.KeyguardUpdateMonitorCallback;
 import com.android.keyguard.logging.KeyguardLogger;
 import com.android.systemui.battery.BatteryMeterViewController;
+import com.android.systemui.dagger.qualifiers.Background;
 import com.android.systemui.dagger.qualifiers.Main;
 import com.android.systemui.flags.FeatureFlags;
 import com.android.systemui.flags.Flags;
@@ -122,6 +124,7 @@
     private final SecureSettings mSecureSettings;
     private final CommandQueue mCommandQueue;
     private final Executor mMainExecutor;
+    private final Executor mBackgroundExecutor;
     private final Object mLock = new Object();
     private final KeyguardLogger mLogger;
 
@@ -296,6 +299,7 @@
             SecureSettings secureSettings,
             CommandQueue commandQueue,
             @Main Executor mainExecutor,
+            @Background Executor backgroundExecutor,
             KeyguardLogger logger,
             NotificationMediaManager notificationMediaManager,
             StatusOverlayHoverListenerFactory statusOverlayHoverListenerFactory
@@ -323,6 +327,7 @@
         mSecureSettings = secureSettings;
         mCommandQueue = commandQueue;
         mMainExecutor = mainExecutor;
+        mBackgroundExecutor = backgroundExecutor;
         mLogger = logger;
 
         mFirstBypassAttempt = mKeyguardBypassController.getBypassEnabled();
@@ -607,8 +612,18 @@
      * Updates visibility of the user switcher button based on {@link android.os.UserManager} state.
      */
     private void updateUserSwitcher() {
-        mView.setUserSwitcherEnabled(mUserManager.isUserSwitcherEnabled(getResources().getBoolean(
-                R.bool.qs_show_user_switcher_for_single_user)));
+        if (updateUserSwitcherBackground()) {
+            mBackgroundExecutor.execute(() -> {
+                final boolean isUserSwitcherEnabled = mUserManager.isUserSwitcherEnabled(
+                        getResources().getBoolean(R.bool.qs_show_user_switcher_for_single_user));
+                mMainExecutor.execute(() -> {
+                    mView.setUserSwitcherEnabled(isUserSwitcherEnabled);
+                });
+            });
+        } else {
+            mView.setUserSwitcherEnabled(mUserManager.isUserSwitcherEnabled(
+                    getResources().getBoolean(R.bool.qs_show_user_switcher_for_single_user)));
+        }
     }
 
     @VisibleForTesting
diff --git a/packages/SystemUI/tests/src/com/android/systemui/statusbar/phone/KeyguardStatusBarViewControllerTest.java b/packages/SystemUI/tests/src/com/android/systemui/statusbar/phone/KeyguardStatusBarViewControllerTest.java
index 2d120cd..76c9740 100644
--- a/packages/SystemUI/tests/src/com/android/systemui/statusbar/phone/KeyguardStatusBarViewControllerTest.java
+++ b/packages/SystemUI/tests/src/com/android/systemui/statusbar/phone/KeyguardStatusBarViewControllerTest.java
@@ -147,6 +147,7 @@
     private KeyguardStatusBarView mKeyguardStatusBarView;
     private KeyguardStatusBarViewController mController;
     private FakeExecutor mFakeExecutor = new FakeExecutor(new FakeSystemClock());
+    private final FakeExecutor mBackgroundExecutor = new FakeExecutor(new FakeSystemClock());
     private final TestScope mTestScope = TestScopeProvider.getTestScope();
     private final FakeKeyguardRepository mKeyguardRepository = new FakeKeyguardRepository();
     private final KosmosJavaAdapter mKosmos = new KosmosJavaAdapter(this);
@@ -214,6 +215,7 @@
                 mSecureSettings,
                 mCommandQueue,
                 mFakeExecutor,
+                mBackgroundExecutor,
                 mLogger,
                 mNotificationMediaManager,
                 mStatusOverlayHoverListenerFactory