Max

According to [ASGI specification](https://asgi.readthedocs.io/en/latest/specs/main.html#applications), both `receive` and `send` should be _an awaitable callable_, where as [`create_task()`](https://docs.python.org/3/library/asyncio-eventloop.html#creating-futures-and-tasks), accept only _coroutine_. [NGINX Unit](http://unit.nginx.org/) ASGI server implementation, provides `receive` and `send` callable which...

It is worth to use memcpy() to avoid extra checks. Furthermore, it fixes possible issues when copied WString has zero byte stored intentionally.