diff --git a/src/Simplex/Chat/Migrations/plan.sql b/src/Simplex/Chat/Migrations/plan.sql
new file mode 100644
index 0000000000..4cb80beb52
--- /dev/null
+++ b/src/Simplex/Chat/Migrations/plan.sql
@@ -0,0 +1,163 @@
+plan
+
+-- direct read
+
+UPDATE chat_items SET item_status = ?, updated_at = ?
+          WHERE user_id = ? AND contact_id = ? AND chat_item_id >= ? AND chat_item_id <= ? AND item_status = ?
+
+EXPLAIN QUERY PLAN UPDATE chat_items SET item_status = ?, updated_at = ?          WHERE user_id = ? AND contact_id = ? AND chat_item_id >= ? AND chat_item_id <= ? AND item_status = ?;
+
+
+UPDATE chat_items SET item_status = ?, updated_at = ?
+          WHERE user_id = ? AND contact_id = ? AND item_status = ?
+
+EXPLAIN QUERY PLAN UPDATE chat_items SET item_status = ?, updated_at = ?          WHERE user_id = ? AND contact_id = ? AND item_status = ?;
+
+-- direct get chat
+-- last
+
+SELECT
+      i.chat_item_id, i.item_ts, i.item_sent, i.item_content, i.item_text, i.item_status, i.shared_msg_id, i.item_deleted, i.item_deleted_ts, i.item_edited, i.created_at, i.updated_at, i.timed_ttl, i.timed_delete_at, i.item_live,
+      f.file_id, f.file_name, f.file_size, f.file_path, f.file_crypto_key, f.file_crypto_nonce, f.ci_file_status, f.protocol,
+      ri.chat_item_id, i.quoted_shared_msg_id, i.quoted_sent_at, i.quoted_content, i.quoted_sent
+    FROM chat_items i
+    LEFT JOIN files f ON f.chat_item_id = i.chat_item_id
+    LEFT JOIN chat_items ri ON ri.user_id = i.user_id AND ri.contact_id = i.contact_id AND ri.shared_msg_id = i.quoted_shared_msg_id
+    WHERE i.user_id = ? AND i.contact_id = ? AND i.item_text LIKE '%' || ? || '%'
+    ORDER BY i.created_at DESC, i.chat_item_id DESC
+    LIMIT ?
+
+EXPLAIN QUERY PLAN SELECT      i.chat_item_id, i.item_ts, i.item_sent, i.item_content, i.item_text, i.item_status, i.shared_msg_id, i.item_deleted, i.item_deleted_ts, i.item_edited, i.created_at, i.updated_at, i.timed_ttl, i.timed_delete_at, i.item_live,      f.file_id, f.file_name, f.file_size, f.file_path, f.file_crypto_key, f.file_crypto_nonce, f.ci_file_status, f.protocol,      ri.chat_item_id, i.quoted_shared_msg_id, i.quoted_sent_at, i.quoted_content, i.quoted_sent    FROM chat_items i    LEFT JOIN files f ON f.chat_item_id = i.chat_item_id    LEFT JOIN chat_items ri ON ri.user_id = i.user_id AND ri.contact_id = i.contact_id AND ri.shared_msg_id = i.quoted_shared_msg_id    WHERE i.user_id = ? AND i.contact_id = ? AND i.item_text LIKE '%' || ? || '%'    ORDER BY i.created_at DESC, i.chat_item_id DESC    LIMIT ?;
+
+-- before
+
+SELECT
+              i.chat_item_id, i.item_ts, i.item_sent, i.item_content, i.item_text, i.item_status, i.shared_msg_id, i.item_deleted, i.item_deleted_ts, i.item_edited, i.created_at, i.updated_at, i.timed_ttl, i.timed_delete_at, i.item_live,
+              f.file_id, f.file_name, f.file_size, f.file_path, f.file_crypto_key, f.file_crypto_nonce, f.ci_file_status, f.protocol,
+              ri.chat_item_id, i.quoted_shared_msg_id, i.quoted_sent_at, i.quoted_content, i.quoted_sent
+            FROM chat_items i
+            LEFT JOIN files f ON f.chat_item_id = i.chat_item_id
+            LEFT JOIN chat_items ri ON ri.user_id = i.user_id AND ri.contact_id = i.contact_id AND ri.shared_msg_id = i.quoted_shared_msg_id
+            WHERE i.user_id = ? AND i.contact_id = ? AND i.item_text LIKE '%' || ? || '%'
+              AND i.chat_item_id < ?
+            ORDER BY i.created_at DESC, i.chat_item_id DESC
+            LIMIT ?
+
+EXPLAIN QUERY PLAN SELECT              i.chat_item_id, i.item_ts, i.item_sent, i.item_content, i.item_text, i.item_status, i.shared_msg_id, i.item_deleted, i.item_deleted_ts, i.item_edited, i.created_at, i.updated_at, i.timed_ttl, i.timed_delete_at, i.item_live,              f.file_id, f.file_name, f.file_size, f.file_path, f.file_crypto_key, f.file_crypto_nonce, f.ci_file_status, f.protocol,              ri.chat_item_id, i.quoted_shared_msg_id, i.quoted_sent_at, i.quoted_content, i.quoted_sent            FROM chat_items i            LEFT JOIN files f ON f.chat_item_id = i.chat_item_id            LEFT JOIN chat_items ri ON ri.user_id = i.user_id AND ri.contact_id = i.contact_id AND ri.shared_msg_id = i.quoted_shared_msg_id            WHERE i.user_id = ? AND i.contact_id = ? AND i.item_text LIKE '%' || ? || '%'              AND i.chat_item_id < ?            ORDER BY i.created_at DESC, i.chat_item_id DESC            LIMIT ?;
+
+-- direct get previews
+-- last
+
+SELECT ct.contact_id, ct.chat_ts as ts, LastItems.chat_item_id, COALESCE(ChatStats.UnreadCount, 0), COALESCE(ChatStats.MinUnread, 0), ct.unread_chat
+        FROM contacts ct
+        LEFT JOIN (
+          SELECT contact_id, chat_item_id, MAX(created_at)
+          FROM chat_items
+          GROUP BY contact_id
+        ) LastItems ON LastItems.contact_id = ct.contact_id
+        LEFT JOIN (
+          SELECT contact_id, COUNT(1) AS UnreadCount, MIN(chat_item_id) AS MinUnread
+          FROM chat_items
+          WHERE item_status = :rcv_new
+          GROUP BY contact_id
+        ) ChatStats ON ChatStats.contact_id = ct.contact_id
+        WHERE ct.user_id = :user_id AND ct.is_user = 0 AND ct.deleted = 0 AND ct.contact_used
+        ORDER BY ts DESC LIMIT :count
+
+EXPLAIN QUERY PLAN SELECT ct.contact_id, ct.chat_ts as ts, LastItems.chat_item_id, COALESCE(ChatStats.UnreadCount, 0), COALESCE(ChatStats.MinUnread, 0), ct.unread_chat        FROM contacts ct        LEFT JOIN (          SELECT contact_id, chat_item_id, MAX(created_at)          FROM chat_items          GROUP BY contact_id        ) LastItems ON LastItems.contact_id = ct.contact_id        LEFT JOIN (          SELECT contact_id, COUNT(1) AS UnreadCount, MIN(chat_item_id) AS MinUnread          FROM chat_items          WHERE item_status = :rcv_new          GROUP BY contact_id        ) ChatStats ON ChatStats.contact_id = ct.contact_id        WHERE ct.user_id = :user_id AND ct.is_user = 0 AND ct.deleted = 0 AND ct.contact_used        ORDER BY ts DESC LIMIT :count;
+
+-- before
+
+SELECT ct.contact_id, ct.chat_ts as ts, LastItems.chat_item_id, COALESCE(ChatStats.UnreadCount, 0), COALESCE(ChatStats.MinUnread, 0), ct.unread_chat
+        FROM contacts ct
+        LEFT JOIN (
+          SELECT contact_id, chat_item_id, MAX(created_at)
+          FROM chat_items
+          GROUP BY contact_id
+        ) LastItems ON LastItems.contact_id = ct.contact_id
+        LEFT JOIN (
+          SELECT contact_id, COUNT(1) AS UnreadCount, MIN(chat_item_id) AS MinUnread
+          FROM chat_items
+          WHERE item_status = :rcv_new
+          GROUP BY contact_id
+        ) ChatStats ON ChatStats.contact_id = ct.contact_id
+        WHERE ct.user_id = :user_id AND ct.is_user = 0 AND ct.deleted = 0 AND ct.contact_used
+        AND ts < :ts ORDER BY ts DESC LIMIT :count
+
+EXPLAIN QUERY PLAN SELECT ct.contact_id, ct.chat_ts as ts, LastItems.chat_item_id, COALESCE(ChatStats.UnreadCount, 0), COALESCE(ChatStats.MinUnread, 0), ct.unread_chat        FROM contacts ct        LEFT JOIN (          SELECT contact_id, chat_item_id, MAX(created_at)          FROM chat_items          GROUP BY contact_id        ) LastItems ON LastItems.contact_id = ct.contact_id        LEFT JOIN (          SELECT contact_id, COUNT(1) AS UnreadCount, MIN(chat_item_id) AS MinUnread          FROM chat_items          WHERE item_status = :rcv_new          GROUP BY contact_id        ) ChatStats ON ChatStats.contact_id = ct.contact_id        WHERE ct.user_id = :user_id AND ct.is_user = 0 AND ct.deleted = 0 AND ct.contact_used        AND ts < :ts ORDER BY ts DESC LIMIT :count;
+
+-- group read
+
+UPDATE chat_items SET item_status = ?, updated_at = ?
+          WHERE user_id = ? AND group_id = ? AND chat_item_id >= ? AND chat_item_id <= ? AND item_status = ?
+
+EXPLAIN QUERY PLAN UPDATE chat_items SET item_status = ?, updated_at = ?          WHERE user_id = ? AND group_id = ? AND chat_item_id >= ? AND chat_item_id <= ? AND item_status = ?;
+
+
+UPDATE chat_items SET item_status = ?, updated_at = ?
+          WHERE user_id = ? AND group_id = ? AND item_status = ?
+
+EXPLAIN QUERY PLAN UPDATE chat_items SET item_status = ?, updated_at = ?          WHERE user_id = ? AND group_id = ? AND item_status = ?;
+
+-- group get chat
+-- last
+
+SELECT chat_item_id
+            FROM chat_items
+            WHERE user_id = ? AND group_id = ? AND item_text LIKE '%' || ? || '%'
+            ORDER BY item_ts DESC, chat_item_id DESC
+            LIMIT ?
+
+EXPLAIN QUERY PLAN SELECT chat_item_id            FROM chat_items            WHERE user_id = ? AND group_id = ? AND item_text LIKE '%' || ? || '%'            ORDER BY item_ts DESC, chat_item_id DESC            LIMIT ?;
+
+-- before
+
+SELECT chat_item_id
+            FROM chat_items
+            WHERE user_id = ? AND group_id = ? AND item_text LIKE '%' || ? || '%'
+              AND (item_ts < ? OR (item_ts = ? AND chat_item_id < ?))
+            ORDER BY item_ts DESC, chat_item_id DESC
+            LIMIT ?
+
+EXPLAIN QUERY PLAN SELECT chat_item_id            FROM chat_items            WHERE user_id = ? AND group_id = ? AND item_text LIKE '%' || ? || '%'              AND (item_ts < ? OR (item_ts = ? AND chat_item_id < ?))            ORDER BY item_ts DESC, chat_item_id DESC            LIMIT ?;
+
+-- get group previews
+-- last
+
+SELECT g.group_id, g.chat_ts as ts, LastItems.chat_item_id, COALESCE(ChatStats.UnreadCount, 0), COALESCE(ChatStats.MinUnread, 0), g.unread_chat
+        FROM groups g
+        LEFT JOIN (
+          SELECT group_id, chat_item_id, MAX(item_ts)
+          FROM chat_items
+          GROUP BY group_id
+        ) LastItems ON LastItems.group_id = g.group_id
+        LEFT JOIN (
+          SELECT group_id, COUNT(1) AS UnreadCount, MIN(chat_item_id) AS MinUnread
+          FROM chat_items
+          WHERE item_status = :rcv_new
+          GROUP BY group_id
+        ) ChatStats ON ChatStats.group_id = g.group_id
+        WHERE g.user_id = :user_id
+        ORDER BY ts DESC LIMIT :count
+
+EXPLAIN QUERY PLAN SELECT g.group_id, g.chat_ts as ts, LastItems.chat_item_id, COALESCE(ChatStats.UnreadCount, 0), COALESCE(ChatStats.MinUnread, 0), g.unread_chat        FROM groups g        LEFT JOIN (          SELECT group_id, chat_item_id, MAX(item_ts)          FROM chat_items          GROUP BY group_id        ) LastItems ON LastItems.group_id = g.group_id        LEFT JOIN (          SELECT group_id, COUNT(1) AS UnreadCount, MIN(chat_item_id) AS MinUnread          FROM chat_items          WHERE item_status = :rcv_new          GROUP BY group_id        ) ChatStats ON ChatStats.group_id = g.group_id        WHERE g.user_id = :user_id        ORDER BY ts DESC LIMIT :count;
+
+-- before
+
+SELECT g.group_id, g.chat_ts as ts, LastItems.chat_item_id, COALESCE(ChatStats.UnreadCount, 0), COALESCE(ChatStats.MinUnread, 0), g.unread_chat
+        FROM groups g
+        LEFT JOIN (
+          SELECT group_id, chat_item_id, MAX(item_ts)
+          FROM chat_items
+          GROUP BY group_id
+        ) LastItems ON LastItems.group_id = g.group_id
+        LEFT JOIN (
+          SELECT group_id, COUNT(1) AS UnreadCount, MIN(chat_item_id) AS MinUnread
+          FROM chat_items
+          WHERE item_status = :rcv_new
+          GROUP BY group_id
+        ) ChatStats ON ChatStats.group_id = g.group_id
+        WHERE g.user_id = :user_id
+        AND ts < :ts ORDER BY ts DESC LIMIT :count
+
+EXPLAIN QUERY PLAN SELECT g.group_id, g.chat_ts as ts, LastItems.chat_item_id, COALESCE(ChatStats.UnreadCount, 0), COALESCE(ChatStats.MinUnread, 0), g.unread_chat        FROM groups g        LEFT JOIN (          SELECT group_id, chat_item_id, MAX(item_ts)          FROM chat_items          GROUP BY group_id        ) LastItems ON LastItems.group_id = g.group_id        LEFT JOIN (          SELECT group_id, COUNT(1) AS UnreadCount, MIN(chat_item_id) AS MinUnread          FROM chat_items          WHERE item_status = :rcv_new          GROUP BY group_id        ) ChatStats ON ChatStats.group_id = g.group_id        WHERE g.user_id = :user_id        AND ts < :ts ORDER BY ts DESC LIMIT :count;