diff --git a/app/src/main/java/io/legado/app/data/entities/SearchBook.kt b/app/src/main/java/io/legado/app/data/entities/SearchBook.kt
index 1b054cb73..29f59717c 100644
--- a/app/src/main/java/io/legado/app/data/entities/SearchBook.kt
+++ b/app/src/main/java/io/legado/app/data/entities/SearchBook.kt
@@ -2,7 +2,12 @@ package io.legado.app.data.entities
 
 import android.content.Context
 import android.os.Parcelable
-import androidx.room.*
+import androidx.room.ColumnInfo
+import androidx.room.Entity
+import androidx.room.ForeignKey
+import androidx.room.Ignore
+import androidx.room.Index
+import androidx.room.PrimaryKey
 import io.legado.app.R
 import io.legado.app.constant.BookType
 import io.legado.app.utils.GSON
@@ -99,6 +104,11 @@ data class SearchBook(
         }
     }
 
+    fun releaseHtmlData() {
+        infoHtml = null
+        tocHtml = null
+    }
+
     fun toBook() = Book(
         name = name,
         author = author,
diff --git a/app/src/main/java/io/legado/app/help/book/BookExtensions.kt b/app/src/main/java/io/legado/app/help/book/BookExtensions.kt
index 18d7c3e59..3925c04d7 100644
--- a/app/src/main/java/io/legado/app/help/book/BookExtensions.kt
+++ b/app/src/main/java/io/legado/app/help/book/BookExtensions.kt
@@ -244,6 +244,11 @@ fun Book.isLocalModified(): Boolean {
     return isLocal && LocalBook.getLastModified(this).getOrDefault(0L) > latestChapterTime
 }
 
+fun Book.releaseHtmlData() {
+    infoHtml = null
+    tocHtml = null
+}
+
 fun Book.isSameNameAuthor(other: Any?): Boolean {
     if (other is BaseBook) {
         return name == other.name && author == other.author
diff --git a/app/src/main/java/io/legado/app/model/webBook/SearchModel.kt b/app/src/main/java/io/legado/app/model/webBook/SearchModel.kt
index 50b811063..6d66e30cb 100644
--- a/app/src/main/java/io/legado/app/model/webBook/SearchModel.kt
+++ b/app/src/main/java/io/legado/app/model/webBook/SearchModel.kt
@@ -87,6 +87,9 @@ class SearchModel(private val scope: CoroutineScope, private val callBack: CallB
                     WebBook.searchBookAwait(it, searchKey, searchPage)
                 }
             }.onEach { items ->
+                for (book in items) {
+                    book.releaseHtmlData()
+                }
                 appDb.searchBookDao.insert(*items.toTypedArray())
                 mergeItems(items, precision)
                 currentCoroutineContext().ensureActive()
diff --git a/app/src/main/java/io/legado/app/ui/book/changesource/ChangeBookSourceViewModel.kt b/app/src/main/java/io/legado/app/ui/book/changesource/ChangeBookSourceViewModel.kt
index 7e7d35228..4c093a516 100644
--- a/app/src/main/java/io/legado/app/ui/book/changesource/ChangeBookSourceViewModel.kt
+++ b/app/src/main/java/io/legado/app/ui/book/changesource/ChangeBookSourceViewModel.kt
@@ -18,10 +18,12 @@ import io.legado.app.data.entities.SearchBook
 import io.legado.app.exception.NoStackTraceException
 import io.legado.app.help.book.BookHelp
 import io.legado.app.help.book.ContentProcessor
+import io.legado.app.help.book.releaseHtmlData
 import io.legado.app.help.config.AppConfig
 import io.legado.app.help.config.SourceConfig
 import io.legado.app.help.coroutine.Coroutine
 import io.legado.app.model.webBook.WebBook
+import io.legado.app.utils.internString
 import io.legado.app.utils.mapParallelSafe
 import io.legado.app.utils.toastOnUi
 import kotlinx.coroutines.CancellationException
@@ -87,6 +89,7 @@ open class ChangeBookSourceViewModel(application: Application) : BaseViewModel(a
         searchCallback = object : SourceCallback {
 
             override fun searchSuccess(searchBook: SearchBook) {
+                searchBook.releaseHtmlData()
                 appDb.searchBookDao.insert(searchBook)
                 when {
                     screenKey.isEmpty() -> searchBooks.add(searchBook)
@@ -227,13 +230,15 @@ open class ChangeBookSourceViewModel(application: Application) : BaseViewModel(a
 
     private suspend fun search(source: BookSource) {
         val resultBooks = WebBook.searchBookAwait(source, name)
-        resultBooks.forEach { searchBook ->
+        resultBooks.filter { searchBook ->
             if (searchBook.name != name) {
-                return@forEach
+                return@filter false
             }
             if (AppConfig.changeSourceCheckAuthor && !searchBook.author.contains(author)) {
-                return@forEach
+                return@filter false
             }
+            true
+        }.forEach { searchBook ->
             when {
                 AppConfig.changeSourceLoadInfo || AppConfig.changeSourceLoadToc || AppConfig.changeSourceLoadWordCount -> {
                     loadBookInfo(source, searchBook.toBook())
@@ -261,8 +266,12 @@ open class ChangeBookSourceViewModel(application: Application) : BaseViewModel(a
 
     private suspend fun loadBookToc(source: BookSource, book: Book) {
         val chapters = WebBook.getChapterListAwait(source, book).getOrThrow()
+        for (chapter in chapters) {
+            chapter.internString()
+        }
         tocMap[book.bookUrl] = chapters
         bookMap[book.bookUrl] = book
+        book.releaseHtmlData()
         if (AppConfig.changeSourceLoadWordCount) {
             loadBookWordCount(source, book, chapters)
         } else {
diff --git a/app/src/main/java/io/legado/app/utils/BookChapterExtensions.kt b/app/src/main/java/io/legado/app/utils/BookChapterExtensions.kt
new file mode 100644
index 000000000..890062f6a
--- /dev/null
+++ b/app/src/main/java/io/legado/app/utils/BookChapterExtensions.kt
@@ -0,0 +1,8 @@
+package io.legado.app.utils
+
+import io.legado.app.data.entities.BookChapter
+
+fun BookChapter.internString() {
+    title = title.intern()
+    bookUrl = bookUrl.intern()
+}