Disruptor-CPP

A high-performance, low-latency C++ library for inter-thread communication, featuring a 1:1 C++ port of LMAX Disruptor (API + tests), plus aligned C++ benchmarks for fair comparison against Java JMH.

Features

• Disruptor (C++ port): include/disruptor/** with namespaces disruptor, disruptor::dsl, disruptor::util
• Tests: Java tests ported to GoogleTest under tests/disruptor/**
• Benchmarks: JMH-aligned C++ benchmarks under benchmarks/jmh/** (Google Benchmark), comparable to Java JMH results

Quick Start (build)

mkdir build && cd build
cmake .. -DCMAKE_BUILD_TYPE=Release
cmake --build .

Performance Results

Throughput (C++ vs Java)

Test	C++	Java	C++/Java
SPSC	310.6 Mops/sec	138.9 Mops/sec	2.24x ⬆️
MPSC (Single Event)	51.4 Mops/sec	36.1 Mops/sec	1.42x ⬆️
MPSC (Batch)	291.6 Mops/sec	208.1 Mops/sec	1.40x ⬆️
SPSC End-to-End	260 Mops/sec	155 Mops/sec	1.68x ⬆️

Latency (SPSC)

Test	C++	Java	C++/Java
SPSC	3.22 ns/op	7.197 ns/op	0.45x ⬇️ (faster)

Results from GitHub Actions CI (4 cores, 3244 MHz). See Benchmark Results for detailed data.

Documentation

• Benchmark Results: docs/BENCHMARK_RESULTS.md
• Build Guide: docs/BUILD_GUIDE.md

Testing

./build/tests/disruptor_cpp_tests      # Unit tests
./build/benchmarks/disruptor_cpp_benchmarks  # Performance benchmarks
./build/examples/basic_example       # Usage example

📄 License

Licensed under the Apache License 2.0. See LICENSE for details.

Inspiration

• LMAX Disruptor - Ultra-fast inter-thread messaging
• Aeron - High-performance messaging transport