diff --git a/README.md b/README.md
index bab4a4c..9033dcf 100644
--- a/README.md
+++ b/README.md
@@ -29,7 +29,6 @@ Environment variable | Default                      | Description
 
 ```python
 from asyncio import AbstractEventLoop
-from typing import Tuple, Optional
 from libservice import start, Asset, CheckBase
 
 
@@ -40,8 +39,8 @@ class MyCheck(CheckBase):
     key = 'my_check'
 
     @classmethod
-    async def run(cls, ts: float, asset: Asset) -> Tuple[
-            Optional[dict], Optional[dict]]:
+    async def run(cls, ts: float, asset: Asset) -> tuple[
+            dict | None, dict | None]:
         # Return with the state and optionally an error dict which can be
         # created using CheckException(my_error_message).to_dict().
         # Alternatively, you can rase a CheckException. The return error is
diff --git a/libservice/asset.py b/libservice/asset.py
index b28df7c..676a50e 100644
--- a/libservice/asset.py
+++ b/libservice/asset.py
@@ -1,6 +1,5 @@
 import base64
 from asyncio import Lock
-from typing import Optional
 from cryptography.fernet import Fernet
 from .ticonn import ticonn
 
@@ -13,8 +12,8 @@ class Asset:
     asset_id: int
     check_id: int
     config: dict
-    key: Optional[bytes]
-    lock: Optional[Lock]
+    key: bytes | None
+    lock: Lock | None
 
     def __init__(self, container_id: int, asset_id: int, check_id: int,
                  config: dict):
diff --git a/libservice/check.py b/libservice/check.py
index 835fe3d..339035a 100644
--- a/libservice/check.py
+++ b/libservice/check.py
@@ -1,10 +1,10 @@
 import abc
 from .asset import Asset
-from typing import Tuple, List, Optional
 
 
 class CheckBase(abc.ABC):
     key: str  # Check key (must not be changed)
+    use_unchanged: bool = False
 
     def __init_subclass__(cls, **kwargs):
         if not hasattr(cls, 'key'):
@@ -15,13 +15,14 @@ def __init_subclass__(cls, **kwargs):
 
     @classmethod
     @abc.abstractmethod
-    async def run(cls, ts: float, asset: Asset) -> Tuple[
-            Optional[dict], Optional[dict]]:
+    async def run(cls, ts: float, asset: Asset) -> tuple[
+            dict | None, dict | None]:
         ...
 
 
 class CheckBaseMulti(abc.ABC):
     key: str  # Check key (must not be changed)
+    use_unchanged: bool = False
 
     def __init_subclass__(cls, **kwargs):
         if not hasattr(cls, 'key'):
@@ -32,6 +33,6 @@ def __init_subclass__(cls, **kwargs):
 
     @classmethod
     @abc.abstractmethod
-    async def run(cls, ts: float, assets: List[Asset]) -> List[
-            Tuple[Optional[dict], Optional[dict]]]:
+    async def run(cls, ts: float, assets: list[Asset]) -> list[
+            tuple[dict | None, dict | None]]:
         ...
diff --git a/libservice/hub/client.py b/libservice/hub/client.py
index 0e965b6..3c972e4 100644
--- a/libservice/hub/client.py
+++ b/libservice/hub/client.py
@@ -1,7 +1,7 @@
 import asyncio
 import logging
 import random
-from typing import Optional, Awaitable, Tuple
+from typing import Awaitable
 from .net.package import Package
 from .protocol import ApiProtocol
 from ..loop import loop
@@ -26,7 +26,7 @@ def close(self):
     def is_connected(self) -> bool:
         return self._protocol is not None and self._protocol.is_connected()
 
-    def connect_pool(self, pool: list) -> Optional[asyncio.Future]:
+    def connect_pool(self, pool: list) -> asyncio.Future | None:
         assert self.is_connected() is False
         assert self._reconnecting is False
         assert len(pool), 'pool must contain at least one node'
@@ -44,7 +44,7 @@ def connect(self, host: str, port: int = 8700,
         self._pool_idx = 0
         return self._connect(timeout=timeout)
 
-    def reconnect(self) -> Optional[asyncio.Future]:
+    def reconnect(self) -> asyncio.Future | None:
         if self._reconnecting:
             return None
         self._reconnecting = True
@@ -128,7 +128,7 @@ async def _write(self, pkg):
         assert self._protocol is not None
         return await self._protocol.request(pkg, timeout=10)
 
-    def send_check_data(self, path: Tuple[int, int],
+    def send_check_data(self, path: tuple[int, int],
                         check_data: dict) -> Awaitable:
         pkg = Package.make(
             ApiProtocol.PROTO_REQ_DATA,
@@ -138,8 +138,8 @@ def send_check_data(self, path: Tuple[int, int],
         return self._request(pkg)
 
     def get_alerts_count(self, container_ids: list,
-                         asset_ids: Optional[list] = None,
-                         user_id: Optional[int] = None) -> Awaitable:
+                         asset_ids: list[int] | None = None,
+                         user_id: int | None = None) -> Awaitable:
         pkg = Package.make(
             ApiProtocol.PROTO_REQ_ALERTS_COUNT,
             data=[container_ids, asset_ids, user_id]
diff --git a/libservice/hub/net/package.py b/libservice/hub/net/package.py
index 26958ef..bd15060 100644
--- a/libservice/hub/net/package.py
+++ b/libservice/hub/net/package.py
@@ -2,7 +2,7 @@
 import logging
 import msgpack
 import struct
-from typing import Any, Optional
+from typing import Any
 
 
 class Package(object):
@@ -11,7 +11,7 @@ class Package(object):
 
     st_package = struct.Struct('<QIHBB')
 
-    def __init__(self, barray: Optional[bytearray] = None):
+    def __init__(self, barray: bytearray | None = None):
         if barray is None:
             return
 
@@ -20,7 +20,7 @@ def __init__(self, barray: Optional[bytearray] = None):
         if self.tp != checkbit ^ 255:
             raise ValueError('invalid checkbit')
         self.total = self.__class__.st_package.size + self.length
-        self.body: Optional[bytearray] = None
+        self.body: bytearray | None = None
         self.data = None
 
     @classmethod
diff --git a/libservice/hub/net/protocol.py b/libservice/hub/net/protocol.py
index bfd8064..c0a682e 100644
--- a/libservice/hub/net/protocol.py
+++ b/libservice/hub/net/protocol.py
@@ -1,6 +1,5 @@
 import asyncio
 import logging
-from typing import Union, Optional, Tuple, Dict
 from .package import Package
 
 
@@ -11,11 +10,11 @@ class Protocol(asyncio.Protocol):
     def __init__(self):
         super().__init__()
         self._buffered_data = bytearray()
-        self._package: Optional[Package] = None
-        self._requests: Dict[int, Tuple[asyncio.Future,
-                                        Optional[asyncio.Task]]] = dict()
+        self._package: Package | None = None
+        self._requests: dict[int, tuple[asyncio.Future,
+                                        asyncio.Task | None]] = dict()
         self._pid = 0
-        self.transport: Optional[asyncio.Transport] = None
+        self.transport: asyncio.Transport | None = None
 
     def connection_made(self, transport: asyncio.BaseTransport):
         '''
@@ -24,7 +23,7 @@ def connection_made(self, transport: asyncio.BaseTransport):
         assert isinstance(transport, asyncio.Transport)
         self.transport = transport
 
-    def connection_lost(self, exc: Optional[Exception]):
+    def connection_lost(self, exc: Exception | None):
         '''
         override asyncio.Protocol
         '''
@@ -36,7 +35,7 @@ def is_connected(self) -> bool:
         return self.transport is not None
 
     def request(self, pkg: Package,
-                timeout: Union[None, float, int] = None
+                timeout: float | int | None = None
                 ) -> asyncio.Future:
         assert self.transport is not None
         self._pid += 1
@@ -82,7 +81,7 @@ def data_received(self, data: bytes):
     def on_package_received(self, pkg: Package):
         raise NotImplementedError
 
-    async def _timer(self, pid: int, timeout: Union[float, int]):
+    async def _timer(self, pid: int, timeout: float | int):
         await asyncio.sleep(timeout)
         try:
             future, task = self._requests.pop(pid)
@@ -93,7 +92,7 @@ async def _timer(self, pid: int, timeout: Union[float, int]):
         future.set_exception(TimeoutError(
             'request timed out on package id {}'.format(pid)))
 
-    def _get_future(self, pkg: Package) -> Optional[asyncio.Future]:
+    def _get_future(self, pkg: Package) -> asyncio.Future | None:
         future, task = self._requests.pop(pkg.pid, (None, None))
         if future is None:
             logging.error(
diff --git a/libservice/hub/protocol.py b/libservice/hub/protocol.py
index 4b42c18..e7a4504 100644
--- a/libservice/hub/protocol.py
+++ b/libservice/hub/protocol.py
@@ -1,5 +1,5 @@
 import logging
-from typing import Optional, Callable
+from typing import Callable
 from .net.package import Package
 from .net.protocol import Protocol
 
@@ -19,7 +19,7 @@ def __init__(self, connection_lost: Callable):
         super().__init__()
         self.set_connection_lost(connection_lost)
 
-    def connection_lost(self, exc: Optional[Exception]):
+    def connection_lost(self, exc: Exception | None):
         super().connection_lost(exc)
         self._connection_lost()
 
diff --git a/libservice/serviceroom.py b/libservice/serviceroom.py
index 15a30c5..8eec688 100644
--- a/libservice/serviceroom.py
+++ b/libservice/serviceroom.py
@@ -8,11 +8,12 @@
 from collections import defaultdict
 from thingsdb.room import Room
 from thingsdb.room import event
-from typing import List, Dict, Tuple, Callable, Union, Optional, Type
+from typing import Callable
 from .hub import hub
 from .exceptions import CheckException, NoCountException
 from .asset import Asset
 from .check import CheckBase, CheckBaseMulti
+from .utils import order
 
 
 THINGSDB_SCOPE = os.getenv('THINGSDB_SCOPE', '//data')
@@ -26,20 +27,21 @@ class ServiceRoom(Room):
 
     def init(self,
              collector_key: str,
-             checks: Tuple[Union[Type[CheckBase], Type[CheckBaseMulti]], ...],
+             checks: tuple[type[CheckBase] | type[CheckBaseMulti], ...],
              on_log_level: Callable[[str], None],
              no_count: bool = False,
              max_timeout: float = 300.0):
         self.collector_key = collector_key
         self._checks = {check.key: check for check in checks}
         self._last = int(time.time())-1
-        self._scheduled: Dict[Tuple[int, int], Dict[int, tuple]] = \
+        self._scheduled: dict[tuple[int, int], dict[int, tuple]] = \
             defaultdict(dict)
         self._on_log_level = on_log_level
         self._no_count = no_count
         self._max_timeout = max_timeout
+        self._prev_checks: dict[tuple[int, int], dict] = {}
 
-    def get_container_id(self, asset_id: int) -> Optional[int]:
+    def get_container_id(self, asset_id: int) -> int | None:
         """Returns a container Id for a given asset Id if the asset is
         scheduled; This can be used to check if an asset is scheduled as
         otherwise the return value or this function is None;"""
@@ -105,8 +107,21 @@ async def _on_container(self, container_id: int, container: dict):
         for cid in children:
             await self._load(cid)
 
-    async def _send_to_hub(self, asset: Asset, result: Optional[dict],
-                           error: Optional[dict], ts: float, no_count: bool):
+    def _unchanged(self, path: tuple, result: dict | None) -> bool:
+        if result is None:
+            self._prev_checks.pop(path, None)
+            return False
+        if self._prev_checks.get(path) == result:
+            return True
+
+        order(result)
+
+        self._prev_checks[path] = result
+        return False
+
+    async def _send_to_hub(self, asset: Asset, result: dict | None,
+                           error: dict | None, ts: float, no_count: bool,
+                           use_unchanged: bool):
         if error:
             logging.error(f'Error: {error}; {asset}')
 
@@ -120,6 +135,12 @@ async def _send_to_hub(self, asset: Asset, result: Optional[dict],
                 'no_count': no_count,
             }
         }
+        if use_unchanged and self._unchanged(path, result):
+            logging.debug(f'using unchanged; {asset}')
+            check_data['framework']['unchanged'] = True
+        else:
+            check_data['result'] = result
+
         try:
             if DRY_RUN:
                 output = json.dumps(check_data, indent=2)
@@ -134,8 +155,8 @@ async def _send_to_hub(self, asset: Asset, result: Optional[dict],
         else:
             logging.debug(f'Successfully send data to hub; {asset}')
 
-    async def _run_multi(self, check: Type[CheckBaseMulti],
-                         assets: List[Asset]):
+    async def _run_multi(self, check: type[CheckBaseMulti],
+                         assets: list[Asset]):
         ts = time.time()
         try:
             results = await asyncio.wait_for(
@@ -153,10 +174,11 @@ async def _run_multi(self, check: Type[CheckBaseMulti],
             results = [(None, error)] * len(assets)
 
         for asset, (result, error) in zip(assets, results):
-            await self._send_to_hub(asset, result, error, ts, self._no_count)
+            await self._send_to_hub(asset, result, error, ts, self._no_count,
+                                    check.use_unchanged)
             await asyncio.sleep(HUB_REQ_SLEEP)
 
-    async def _run(self, check: Type[CheckBase], asset: Asset):
+    async def _run(self, check: type[CheckBase], asset: Asset):
         ts = time.time()
         no_count = self._no_count
         timeout = min(0.8 * asset.get_interval(), self._max_timeout)
@@ -174,7 +196,8 @@ async def _run(self, check: Type[CheckBase], asset: Asset):
             msg = str(e) or type(e).__name__
             result, error = None, CheckException(msg).to_dict()
 
-        await self._send_to_hub(asset, result, error, ts, no_count)
+        await self._send_to_hub(asset, result, error, ts, no_count,
+                                check.use_unchanged)
 
     async def run_loop(self):
         while True:
@@ -205,7 +228,7 @@ def on_set_log_level(self, log_level: str):
 
     @event('upsert-asset')
     def on_upsert_asset(self, container_id: int,
-                        service_data: Tuple[int, tuple]):
+                        service_data: tuple[int, tuple]):
         logging.debug('on upsert asset')
         asset_id, services = service_data
         key = (container_id, asset_id)
@@ -224,7 +247,7 @@ def on_upsert_asset(self, container_id: int,
                 self._scheduled[key][check_id] = (check_key, config)
 
     @event('unset-assets')
-    def on_unset_assets(self, container_id: int, asset_ids: Tuple[int, ...]):
+    def on_unset_assets(self, container_id: int, asset_ids: tuple[int, ...]):
         logging.debug('on unset assets')
         for asset_id in asset_ids:
             key = (container_id, asset_id)
diff --git a/libservice/start.py b/libservice/start.py
index a142d97..0a87bec 100644
--- a/libservice/start.py
+++ b/libservice/start.py
@@ -3,7 +3,7 @@
 import signal
 import os
 from asyncio import AbstractEventLoop
-from typing import Tuple, Union, Optional, Callable, Type
+from typing import Callable
 from .check import CheckBase, CheckBaseMulti
 from .serviceroom import service_room
 from .hub import hub
@@ -65,9 +65,9 @@ def _stop(signame, *args):
 
 
 def start(collector_key: str, version: str,
-          checks: Tuple[Union[Type[CheckBase], Type[CheckBaseMulti]], ...],
-          start_func: Optional[Callable[[AbstractEventLoop], None]] = None,
-          close_func: Optional[Callable[[AbstractEventLoop], None]] = None,
+          checks: tuple[type[CheckBase] | type[CheckBaseMulti], ...],
+          start_func: Callable[[AbstractEventLoop], None] | None = None,
+          close_func: Callable[[AbstractEventLoop], None] | None = None,
           no_count: bool = False, max_timeout: float = 300.0):
     if THINGSDB_TOKEN is None:
         raise Exception('Missing `THINGSDB_TOKEN` environment variable')
diff --git a/libservice/utils.py b/libservice/utils.py
new file mode 100644
index 0000000..aa6b41c
--- /dev/null
+++ b/libservice/utils.py
@@ -0,0 +1,8 @@
+def _item_name(item: dict) -> str:
+    return item['name']
+
+
+def order(result: dict):
+    """Order result items by item name."""
+    for items in result.values():
+        items.sort(key=_item_name)
diff --git a/version.py b/version.py
index 1f356cc..cd7ca49 100644
--- a/version.py
+++ b/version.py
@@ -1 +1 @@
-__version__ = '1.0.0'
+__version__ = '1.0.1'