Make Cassandra faster with a one-line install

SpeedyIO is an intelligent LD_PRELOAD layer that boosts throughput by 30% and cuts P99 latency by 35% on mixed read-write workloads — using the same AWS instances. No schema migration. Just restart.

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Benchmarks, design notes, and release updates.
Benchmark (YCSB, mixed R/W): Throughput ↑ 30% • P99 ↓ 35% • Same AWS instance type
P99 Latency Improvement
Drop-in via LD_PRELOAD
No schema or code changes
Better cache residency
Fewer stalls under compaction
Safe rollback
No on-disk format changes

How it works

1
Preload
LD_PRELOAD hooks I/O hot paths.
2
Smarter cache
Improves page-cache residency; fewer stalls under compaction.
3
Rollback-safe
No on-disk format changes; remove preload to revert.

What you get

  • +30% throughput on mixed read/write.
  • −35% P99 latency under load.
  • Same AWS instances — no hardware change.
  • One-line install (LD_PRELOAD) + restart.
  • No schema migration, no app changes.
  • Cassandra first; extending across the stack.