write asynchronous code in Tornado. Coroutines use the Python yield keyword to suspend and resume execution instead of a chain of callbacks (cooperative lightweight threads as seen in frameworks like gevent instance (even indirectly) before the fork. Second, it is difficult to do zero-downtime updates in this model. Finally, since all the processes share the same port it is more difficult to monitor them individually asynchronous (the asynchronous decorator cannot be used on prepare). If this method returns a Future execution will not proceed until the Future is done. New in version 3.1: Asynchronous support. RequestHandler

write asynchronous code in Tornado. Coroutines use the Python yield keyword to suspend and resume execution instead of a chain of callbacks (cooperative lightweight threads as seen in frameworks like gevent instance (even indirectly) before the fork. Second, it is difficult to do zero-downtime updates in this model. Finally, since all the processes share the same port it is more difficult to monitor them individually chronous (the asynchronous decorator cannot be used on prepare). If this method returns a Future execution will not proceed until the Future is done. New in version 3.1: Asynchronous support. RequestHandler

asynchronous code in Tornado. Coroutines use the Python await or yield keyword to suspend and resume execution instead of a chain of callbacks (cooperative lightweight threads as seen in frameworks like gevent instance (even indirectly) before the fork. Second, it is difficult to do zero-downtime updates in this model. Finally, since all the processes share the same port it is more difficult to monitor them individually chronous (the asynchronous decorator cannot be used on prepare). If this method returns a Future execution will not proceed until the Future is done. New in version 3.1: Asynchronous support. RequestHandler

asynchronous code in Tornado. Coroutines use the Python await or yield keyword to suspend and resume execution instead of a chain of callbacks (cooperative lightweight threads as seen in frameworks like gevent instance (even indirectly) before the fork. Second, it is difficult to do zero-downtime updates in this model. Finally, since all the processes share the same port it is more difficult to monitor them individually asynchronous (the asynchronous decorator cannot be used on prepare). If this method returns a Future execution will not proceed until the Future is done. New in version 3.1: Asynchronous support. RequestHandler

asynchronous code in Tornado. Coroutines use the Python await or yield keyword to suspend and resume execution instead of a chain of callbacks (cooperative lightweight threads as seen in frameworks like gevent instance (even indirectly) before the fork. Second, it is difficult to do zero-downtime updates in this model. Finally, since all the processes share the same port it is more difficult to monitor them individually decorate this method with gen.coroutine to make it asyn- chronous. If this method returns an Awaitable execution will not proceed until the Awaitable is done. New in version 3.1: Asynchronous support. RequestHandler

asynchronous code in Tornado. Coroutines use the Python await or yield keyword to suspend and resume execution instead of a chain of callbacks (cooperative lightweight threads as seen in frameworks like gevent instance (even indirectly) before the fork. Second, it is difficult to do zero-downtime updates in this model. Finally, since all the processes share the same port it is more difficult to monitor them individually decorate this method with gen.coroutine to make it asyn- chronous. If this method returns an Awaitable execution will not proceed until the Awaitable is done. New in version 3.1: Asynchronous support. RequestHandler

write asynchronous code in Tornado. Coroutines use the Python await keyword to suspend and resume execution instead of a chain of callbacks (cooperative lightweight threads as seen in frameworks like gevent instance (even indirectly) before the fork. Second, it is difficult to do zero-downtime updates in this model. Finally, since all the processes share the same port it is more difficult to monitor them individually decorate this method with gen.coroutine to make it asynchronous. If this method returns an Awaitable execution will not proceed until the Awaitable is done. New in version 3.1: Asynchronous support. RequestHandler

write asynchronous code in Tornado. Coroutines use the Python await keyword to suspend and resume execution instead of a chain of callbacks (cooperative lightweight threads as seen in frameworks like gevent instance (even indirectly) before the fork. Second, it is difficult to do zero-downtime updates in this model. Finally, since all the processes share the same port it is more difficult to monitor them individually decorate this method with gen.coroutine to make it asynchronous. If this method returns an Awaitable execution will not proceed until the Awaitable is done. New in version 3.1: Asynchronous support. 6.2. Web

write asynchronous code in Tornado. Coroutines use the Python await keyword to suspend and resume execution instead of a chain of callbacks (cooperative lightweight threads as seen in frameworks like gevent instance (even indirectly) before the fork. Second, it is difficult to do zero-downtime updates in this model. Finally, since all the processes share the same port it is more difficult to monitor them individually decorate this method with gen.coroutine to make it asynchronous. If this method returns an Awaitable execution will not proceed until the Awaitable is done. New in version 3.1: Asynchronous support. RequestHandler

write asynchronous code in Tornado. Coroutines use the Python await keyword to suspend and resume execution instead of a chain of callbacks (cooperative lightweight threads as seen in frameworks like gevent instance (even indirectly) before the fork. Second, it is difficult to do zero-downtime updates in this model. Finally, since all the processes share the same port it is more difficult to monitor them individually decorate this method with gen.coroutine to make it asynchronous. If this method returns an Awaitable execution will not proceed until the Awaitable is done. New in version 3.1: Asynchronous support. RequestHandler