diff --git a/duetector/service/base.py b/duetector/service/base.py
index cd14fcb..4610185 100644
--- a/duetector/service/base.py
+++ b/duetector/service/base.py
@@ -1,5 +1,10 @@
 from typing import Any, Dict, Optional
 
+try:
+    from functools import cache
+except ImportError:
+    from functools import lru_cache as cache
+
 from fastapi import Depends
 
 from duetector.config import Configuable
@@ -15,6 +20,7 @@ def __init__(self, config: Optional[Dict[str, Any]] = None, *args, **kwargs):
         super().__init__(config, *args, **kwargs)
 
 
+@cache
 def get_controller(controller_type: type):
     def _(config: dict = Depends(get_config)) -> Controller:
         return controller_type(config)
diff --git a/duetector/service/query/routes.py b/duetector/service/query/routes.py
index 7700760..f25b889 100644
--- a/duetector/service/query/routes.py
+++ b/duetector/service/query/routes.py
@@ -1,4 +1,7 @@
+from asyncio import sleep
+
 from fastapi import APIRouter, Body, Depends
+from fastapi.concurrency import run_in_threadpool
 
 from duetector.service.base import get_controller
 from duetector.service.query.controller import AnalyzerController
@@ -35,7 +38,7 @@ async def query(
     Query data from analyzer
     """
     analyzer = controller.get_analyzer(analyzer_name)
-    trackings = analyzer.query(**query_param.model_dump())
+    trackings = await run_in_threadpool(analyzer.query, **query_param.model_dump())
 
     return QueryResult(
         trackings=trackings,
@@ -50,8 +53,8 @@ async def query_brief(
 ):
     # type is not serializable, so we need to get analyzer without inspect type
     analyzer = controller.get_analyzer(analyzer_name)
-
+    brief = await run_in_threadpool(analyzer.brief, inspect_type=False)
     return BriefResult(
-        brief=analyzer.brief(inspect_type=False),
+        brief=brief,
         analyzer_name=analyzer_name,
     )
diff --git a/pyproject.toml b/pyproject.toml
index 51283ee..491bc31 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -19,6 +19,7 @@ dependencies = [
     # Following are for web server
     "fastapi",
     "uvicorn[standard]",
+    "anyio"
 ]
 dynamic = ["version"]
 classifiers = [