From 6d2f5da5063ca0285d879d8b8fada42023f9786c Mon Sep 17 00:00:00 2001
From: pcinkh <pcinkh@gmail.com>
Date: Wed, 11 Oct 2017 14:02:26 +0300
Subject: [PATCH] Speedup websocket disconnects.

---
 sanic/app.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/sanic/app.py b/sanic/app.py
index 8f1e0b90..8f70b6e7 100644
--- a/sanic/app.py
+++ b/sanic/app.py
@@ -54,7 +54,7 @@ class Sanic:
         self.is_running = False
         self.is_request_stream = False
         self.websocket_enabled = False
-        self.websocket_tasks = []
+        self.websocket_tasks = set()
 
         # Register alternative method names
         self.go_fast = self.run
@@ -259,7 +259,7 @@ class Sanic:
                 # its future is kept in self.websocket_tasks in case it
                 # needs to be cancelled due to the server being stopped
                 fut = ensure_future(handler(request, ws, *args, **kwargs))
-                self.websocket_tasks.append(fut)
+                self.websocket_tasks.add(fut)
                 try:
                     await fut
                 except (CancelledError, ConnectionClosed):