
Dragonfly
Modern Redis/Memcached replacement
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Dragonfly claims to be a modern Redis replacement — same API, same commands, but with a multi-threaded architecture that uses every CPU core instead of Redis's single-threaded model. The pitch: 25x more throughput, 80% less memory, drop-in compatible.
If you're running Redis and hitting single-thread bottlenecks, Dragonfly is worth benchmarking. It's API-compatible, so migration is theoretically seamless. Valkey is the community fork of Redis after the license change. KeyDB is another multi-threaded Redis fork. Redis itself is still the default with the largest ecosystem.
The catch: The BSL-style license means you can't build a competing caching service. Independent benchmarks tell a different story than Dragonfly's marketing — Redis actually beat Dragonfly by 18-40% in some tests. The multi-threaded advantage only matters at very high throughput. For most indie projects, Redis or Valkey on a single core is more than enough, and the ecosystem support is vastly deeper.
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