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Introduction

seqflow is a high-performance, lock-free Disruptor library for Go.

The name comes from Sequence-driven Flow — the core mechanism of the LMAX Disruptor pattern: all coordination happens through atomic progression of sequence numbers, not locks or channels.

Why seqflow​

Go channels are great for most use cases. But in high-throughput, low-latency scenarios, they become the bottleneck — lock contention, memory allocation, GC pressure.

seqflow replaces channels with a pre-allocated ring buffer + sequence number coordination. The result:

  • ~10x faster than Go channel (single-writer)
  • Zero allocations on the hot path
  • DAG consumer topology for complex processing pipelines

When to use​

  • Financial trading systems (order matching, market data)
  • Log/event pipelines (high-throughput ingest → multi-stage processing)
  • Real-time data processing (IoT sensors, monitoring aggregation)
  • Game servers (frame sync, message broadcast)

When NOT to use​

  • Cross-network communication (use a message queue)
  • Low-frequency CRUD (channels are fine)
  • Need persistence (use Kafka)