针对复杂同步任务，DataWorks 将单个实例的 CDC 流拆分为多个子任务，并通过 Pk Shuffle 机制实现数据分发，支持多表、多库并行处理。例如，MySQL 实例下的多个 DB 可独立调度，提升整体并发度，降低端到端延迟，满足高负载业务场景需求。
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Falling headlong off the tee() memory cliff
BYOB (bring your own buffer) reads were designed to let developers reuse memory buffers when reading from streams — an important optimization intended for high-throughput scenarios. The idea is sound: instead of allocating new buffers for each chunk, you provide your own buffer and the stream fills it.