diff --git a/cista/app.py b/cista/app.py
index c99919c..a58ae3b 100755
--- a/cista/app.py
+++ b/cista/app.py
@@ -2,6 +2,7 @@ import mimetypes
 from importlib.resources import files
 from urllib.parse import unquote
 
+import asyncio
 import brotli
 from sanic import Blueprint, Sanic, raw
 from sanic.exceptions import Forbidden, NotFound
@@ -64,27 +65,36 @@ www = {}
 
 @app.before_server_start
 def load_wwwroot(app):
-    www.clear()
+    global www
+    wwwnew = {}
     base = files("cista") / "wwwroot"
     paths = ["."]
     while paths:
         path = paths.pop(0)
         current = base / path
-        print(">>>", current)
         for p in current.iterdir():
             if p.is_dir():
-                print(p)
                 paths.append(current / p.parts[-1])
                 continue
             name = p.relative_to(base).as_posix()
             mime = mimetypes.guess_type(name)[0] or "application/octet-stream"
             data = p.read_bytes()
+            # Use old data if not changed
+            if name in www and www[name][0] == data:
+                wwwnew[name] = www[name]
+                continue
+            # Precompress with Brotli
             br = brotli.compress(data)
             if len(br) >= len(data):
                 br = False
-            print(name, len(data), len(br) if br else br, mime)
-            www[name] = data, br, mime
+            wwwnew[name] = data, br, mime
+    www = wwwnew
 
+@app.add_task
+async def refresh_wwwroot():
+    while app.debug:
+        await asyncio.sleep(0.5)
+        load_wwwroot(app)
 
 @app.get("/<path:path>", static=True)
 async def wwwroot(req, path=""):