diff --git a/backend/stream.py b/backend/stream.py
index dd52d77..3dfac48 100755
--- a/backend/stream.py
+++ b/backend/stream.py
@@ -218,7 +218,6 @@ except Exception as e:
     logger.info(e)
 
 async def rewrite(upstream, current, proxy):
-    rewrite_start = (time.time_ns() // 1_000_000)
     ndata = None
     text = None
     try:
@@ -230,9 +229,11 @@ async def rewrite(upstream, current, proxy):
     if text is not None:
         lines = text.splitlines()
         links = []
+        pattern_match = re.compile(r'(?<=URI=").+(?=")')
+        pattern_sub = re.compile(r'URI=".+"')
         for line in lines:
             if line.startswith("#EXT-X-KEY:METHOD="):
-                matches = re.findall(r'(?<=URI=").+(?=")', line)
+                matches = pattern_match.findall(line)
                 if len(matches) == 1:
                     ldata = {}
                     ldata["upstream"] = urllib.parse.urljoin(current, matches[0])
@@ -260,17 +261,15 @@ async def rewrite(upstream, current, proxy):
                     links = json.loads(link_text)
                     for line in lines:
                         if line.startswith("#EXT-X-KEY:METHOD="):
-                            matches = re.findall(r'(?<=URI=").+(?=")', line)
+                            matches = pattern_match.findall(line)
                             if len(matches) == 1:
                                 new_url = links.pop(0)
-                                ndata += re.sub(r'URI=".+"', f'URI="{new_url}"', line)
+                                ndata += pattern_sub.sub(f'URI="{new_url}"', line)
                         elif line.startswith("#"):
                             ndata += line
                         else:
                             ndata += links.pop(0)
                         ndata += "\n"
-        rewrite_stop = (time.time_ns() // 1_000_000)
-        logger.info(str(rewrite_stop - rewrite_start))
         return ndata
 
 class MainHandler(tornado.web.RequestHandler):