Tornado 4.0.2 新特性¶

• AsyncTestCase once again passes along arguments to test methods,making it compatible with extensions such as Nose’s test generators.
• can again compress its responses when gzip is enabled.
• Fixed a reference cycle that can lead to increased memory consumption.
• add_accept_handler will now limit the number of times it will call per IOLoop iteration, addressing a potentialstarvation issue.