From 0e0fffc138db1cb70f1fc5056d0c3607343d7078 Mon Sep 17 00:00:00 2001
From: Paul Sokolovsky <pfalcon@users.sourceforge.net>
Date: Mon, 4 Jul 2016 12:57:08 +0300
Subject: [PATCH] uasyncio.core: Optimize case of resuming coro with no args.

Don't create a new tuple with empty arguments for coro.send(), just use
next(coro).
---
 uasyncio.core/uasyncio/core.py | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/uasyncio.core/uasyncio/core.py b/uasyncio.core/uasyncio/core.py
index 0bb8928f..10e97070 100644
--- a/uasyncio.core/uasyncio/core.py
+++ b/uasyncio.core/uasyncio/core.py
@@ -64,11 +64,12 @@ class EventLoop:
             else:
                 delay = 0
                 try:
-                    if args == ():
-                        args = (None,)
                     if __debug__:
                         log.debug("Coroutine %s send args: %s", cb, args)
-                    ret = cb.send(*args)
+                    if args == ():
+                        ret = next(cb)
+                    else:
+                        ret = cb.send(*args)
                     if __debug__:
                         log.debug("Coroutine %s yield result: %s", cb, ret)
                     if isinstance(ret, SysCall1):