rigtorp/SPSCQueue

Health v2 · maintenance only

Adoption not part of the score

1280 stars · 166 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

A header-only C++11 library providing a bounded single-producer single-consumer wait-free and lock-free queue. It is optimized for high-performance inter-thread communication and claims to outperform boost::lockfree::spsc and folly::ProducerConsumerQueue.

Use cases

• pass messages between two threads with minimal latency
• implement a lock-free producer-consumer pipeline in C++
• replace boost::lockfree::spsc_queue with a faster alternative
• build a fixed-capacity ring buffer for inter-thread data transfer
• share data between one writer and one reader thread without locks

When to choose

• you have exactly one producer thread and one consumer thread
• you need wait-free, bounded queue semantics with predictable latency
• you want a dependency-free header-only C++11 solution
• throughput and cache efficiency matter more than dynamic sizing

When to avoid

• you need multiple producers or multiple consumers
• you need an unbounded or dynamically growing queue
• you need blocking with condition variables or cross-thread wakeup built in
• you are not programming in C++

Facets

library · maturity stable

concurrency message-queue developer-tools performance cpp cross-platform lock-free spsc-queue header-only wait-free single-producer-single-consumer cpp11 algorithms

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