自 2015 年 12 月推出以来，UberEATS 已经服务了全球 100 多个城市的亿万食客。本次演讲将以派单相关系统为主，一起回顾 UberEATS 发展过程中的工程挑战与机遇。派单系统从单一作业（single-job）的局部优化进化为即时/连续（just-in-time/continuous）的全局优化，我们将分享此过程中的思考，并将通过一些有趣的使用案例，阐述为让外卖无论何时、无论何地都能快速、可靠、高效地送达，在工程方面所做的努力。

Since its inauguration in December 2015, UberEATS has served millions of eaters from 100+ cities across the globe. In this talk, we will look at the engineering challenges and opportunities in scaling UberEATS, especially in the areas related to dispatch. We will present the organic evolution of our dispatch system from ‘single-job’ local optimization to ‘just-in-time/continuous’ global optimization. We will go through some interesting use cases to demonstrate the engineering effort to make food delivery fast, reliable, and efficient anywhere, at any time.