diff --git a/app/src/main/kotlin/li/songe/gkd/data/AppInfo.kt b/app/src/main/kotlin/li/songe/gkd/data/AppInfo.kt
index 4d3601e..c62d546 100644
--- a/app/src/main/kotlin/li/songe/gkd/data/AppInfo.kt
+++ b/app/src/main/kotlin/li/songe/gkd/data/AppInfo.kt
@@ -21,6 +21,9 @@ data class AppInfo(
     val hidden: Boolean,
 )
 
+/**
+ * 平均单次调用时间 11ms
+ */
 fun PackageInfo.toAppInfo(): AppInfo? {
     applicationInfo ?: return null
     return AppInfo(
diff --git a/app/src/main/kotlin/li/songe/gkd/util/AppInfoState.kt b/app/src/main/kotlin/li/songe/gkd/util/AppInfoState.kt
index b9b4580..f1589d4 100644
--- a/app/src/main/kotlin/li/songe/gkd/util/AppInfoState.kt
+++ b/app/src/main/kotlin/li/songe/gkd/util/AppInfoState.kt
@@ -6,6 +6,8 @@ import android.content.Intent
 import android.content.IntentFilter
 import android.content.pm.PackageManager
 import android.os.Build
+import com.blankj.utilcode.util.LogUtils
+import kotlinx.collections.immutable.persistentMapOf
 import kotlinx.collections.immutable.toImmutableList
 import kotlinx.collections.immutable.toImmutableMap
 import kotlinx.coroutines.Dispatchers
@@ -18,17 +20,22 @@ import li.songe.gkd.appScope
 import li.songe.gkd.data.AppInfo
 import li.songe.gkd.data.toAppInfo
 
-val appInfoCacheFlow = MutableStateFlow(emptyMap<String, AppInfo>().toImmutableMap())
+val appInfoCacheFlow = MutableStateFlow(persistentMapOf<String, AppInfo>().toImmutableMap())
 
-val systemAppInfoCacheFlow =
-    appInfoCacheFlow.map(appScope) { c -> c.filter { a -> a.value.isSystem }.toImmutableMap() }
+val systemAppInfoCacheFlow by lazy {
+    appInfoCacheFlow.map(appScope) { c ->
+        c.filter { a -> a.value.isSystem }.toImmutableMap()
+    }
+}
 
-val systemAppsFlow = systemAppInfoCacheFlow.map(appScope) { c -> c.keys }
+val systemAppsFlow by lazy { systemAppInfoCacheFlow.map(appScope) { c -> c.keys } }
 
-val orderedAppInfosFlow = appInfoCacheFlow.map(appScope) { c ->
-    c.values.sortedWith { a, b ->
-        collator.compare(a.name, b.name)
-    }.toImmutableList()
+val orderedAppInfosFlow by lazy {
+    appInfoCacheFlow.map(appScope) { c ->
+        c.values.sortedWith { a, b ->
+            collator.compare(a.name, b.name)
+        }.toImmutableList()
+    }
 }
 
 private val packageReceiver by lazy {
@@ -94,6 +101,7 @@ val appRefreshingFlow = MutableStateFlow(false)
 
 suspend fun initOrResetAppInfoCache() {
     if (updateAppMutex.isLocked) return
+    LogUtils.d("initOrResetAppInfoCache start")
     appRefreshingFlow.value = true
     updateAppMutex.withLock {
         val oldAppIds = appInfoCacheFlow.value.keys
@@ -111,6 +119,7 @@ suspend fun initOrResetAppInfoCache() {
         appInfoCacheFlow.value = appMap.toImmutableMap()
     }
     appRefreshingFlow.value = false
+    LogUtils.d("initOrResetAppInfoCache end")
 }
 
 fun initAppState() {