Differential Dataflow News Today

C++20 added minimal support for coroutines. I think they're done in a way that really doesn't fit into C++, mostly because they don't follow the zero-overhead principle. Calling a coroutine can be very expensive (requiring calls to new() and delete()) in a way that's not entirely under your control, and they're designed to make it…

The startup's managed, distributed database service is designed to run queries against real-time data in a more cost-efficient manner than batch processing systems.

This is alpha-quality software, not feature-complete, and not yet ready for use in production services. 3DF is best thought of as a pub/sub system in which subscriptions can be arbitrary Datalog expressions. Subscribers register queries with the broker, and data sources (such as Kafka, Datomic, or any other source-of-truth) publish new data to it. All subscriber queries affected by incoming data will be notified with a diff, describing how their results have changed. The Datalog implementation ...