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We propose a general execution model which views routing as an incremental data-parallel computation on a graph-based network model plus a continuous stream of network changes. ... Routing controllers must react quickly to failures, reconfigurations and workload or policy changes, to ensure service performance and cost-efficient network operation. ... Combining this model with a high-performance implementation based on Timely Dataflow, our prototype SDN routing application for all-pairs shortest path, DeltaPath, delivers much higher performance than ...arXiv:1808.06893v1 fatcat:jzshlqg7pfdzfokrfigmrsqgya