Don't recompute constant device info

app/src/main/java/eu/kanade/tachiyomi/data/preference/PreferencesHelper.kt

@@ -326,7 +326,7 @@ class PreferencesHelper(val context: Context) {
 
     fun extensionInstaller() = flowPrefs.getEnum(
         Keys.extensionInstaller,
-        if (DeviceUtil.isMiui()) Values.ExtensionInstaller.LEGACY else Values.ExtensionInstaller.PACKAGEINSTALLER
+        if (DeviceUtil.isMiui) Values.ExtensionInstaller.LEGACY else Values.ExtensionInstaller.PACKAGEINSTALLER
     )
 
     fun verboseLogging() = prefs.getBoolean(Keys.verboseLogging, false)

app/src/main/java/eu/kanade/tachiyomi/network/interceptor/CloudflareInterceptor.kt

@@ -41,7 +41,7 @@ class CloudflareInterceptor(private val context: Context) : Interceptor {
     private val initWebView by lazy {
         // Avoid crashes on Samsung devices on Android 12
         // See https://bugs.chromium.org/p/chromium/issues/detail?id=1279562
-        if (Build.VERSION.SDK_INT == Build.VERSION_CODES.S && DeviceUtil.isSamsung()) {
+        if (Build.VERSION.SDK_INT == Build.VERSION_CODES.S && DeviceUtil.isSamsung) {
             return@lazy
         }
 

app/src/main/java/eu/kanade/tachiyomi/ui/setting/SettingsAdvancedController.kt

@@ -215,7 +215,7 @@ class SettingsAdvancedController : SettingsController() {
                     R.string.ext_installer_shizuku,
                 )
                 entryValues = PreferenceValues.ExtensionInstaller.values().map { it.name }.toTypedArray()
-                defaultValue = if (DeviceUtil.isMiui()) {
+                defaultValue = if (DeviceUtil.isMiui) {
                     PreferenceValues.ExtensionInstaller.LEGACY
                 } else {
                     PreferenceValues.ExtensionInstaller.PACKAGEINSTALLER

app/src/main/java/eu/kanade/tachiyomi/ui/setting/SettingsBackupController.kt

@@ -62,7 +62,7 @@ class SettingsBackupController : SettingsController() {
             summaryRes = R.string.pref_create_backup_summ
 
             onClick {
-                if (DeviceUtil.isMiui() && DeviceUtil.isMiuiOptimizationDisabled()) {
+                if (DeviceUtil.isMiui && DeviceUtil.isMiuiOptimizationDisabled()) {
                     context.toast(R.string.restore_miui_warning, Toast.LENGTH_LONG)
                 }
 
@@ -81,7 +81,7 @@ class SettingsBackupController : SettingsController() {
             summaryRes = R.string.pref_restore_backup_summ
 
             onClick {
-                if (DeviceUtil.isMiui() && DeviceUtil.isMiuiOptimizationDisabled()) {
+                if (DeviceUtil.isMiui && DeviceUtil.isMiuiOptimizationDisabled()) {
                     context.toast(R.string.restore_miui_warning, Toast.LENGTH_LONG)
                 }
 

app/src/main/java/eu/kanade/tachiyomi/util/system/DeviceUtil.kt

@@ -3,11 +3,12 @@ package eu.kanade.tachiyomi.util.system
 import android.annotation.SuppressLint
 import android.os.Build
 import logcat.LogPriority
-import java.util.Locale
 
 object DeviceUtil {
 
-    fun isMiui() = getSystemProperty("ro.miui.ui.version.name")?.isNotEmpty() ?: false
+    val isMiui by lazy {
+        getSystemProperty("ro.miui.ui.version.name")?.isNotEmpty() ?: false
+    }
 
     @SuppressLint("PrivateApi")
     fun isMiuiOptimizationDisabled(): Boolean {
@@ -25,7 +26,9 @@ object DeviceUtil {
         }
     }
 
-    fun isSamsung() = Build.MANUFACTURER.lowercase(Locale.ENGLISH) == "samsung"
+    val isSamsung by lazy {
+        Build.MANUFACTURER.equals("samsung", ignoreCase = true)
+    }
 
     @SuppressLint("PrivateApi")
     private fun getSystemProperty(key: String?): String? {