Dragonfly vs. Valkey 9.0 on AWS Graviton: An Honest Head-to-Head

The comparison between Dragonfly and Valkey 9.0 on AWS Graviton instances reveals significant advancements in Valkey's I/O throughput, especially in read-heavy workloads on smaller instances, narrowing the performance gap established with Valkey 8.0.2. Despite these improvements, Dragonfly's architecture still leads in write throughput, vertical scaling, tail latency, and memory efficiency, with Dragonfly achieving up to 6.6 million QPS in a single process setup on c7gn.metal instances. The tests were conducted with identical hardware and network configurations to ensure unbiased results, and they highlight the strengths of Dragonfly's thread-per-core design compared to Valkey's single-threaded command execution model. While Valkey 9.0 shows progress in certain areas, particularly for read-dominant and tail-tolerant workloads, Dragonfly continues to excel in overall performance metrics, offering a scalable solution without the need for clustering.

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