facebook/folly
Folly
Folly is a collection of high-performance C++ components designed as an extension to the C++ Standard Library for large-scale production environments. It provides specialized toolkits for memory management, concurrency, asynchronous workflows, and low-latency input and output operations.
The project distinguishes itself through the provision of lock-free containers and bounded queues to minimize contention in multi-threaded applications, alongside a framework for managing deferred computations using futures and promises. It further offers specialized memory arenas and optimized implementations of strings and vectors to reduce allocation overhead and fragmentation.
The library covers a broad surface of system-level engineering, including high-throughput network IO, IP address and URI management, and the execution of system subprocesses. It also includes utilities for system statistics collection via counters and histograms, JSON serialization, and high-speed type conversion.
The project enables compiling source code into shared or static binary libraries tailored for specific target architectures.
Features
- Performance Optimization Libraries - Provides a collection of high-performance C++ components designed for low-latency production environments.
- Asynchronous Future APIs - Ships a robust framework for managing deferred computations through a promise and future asynchronous pattern.
- High-Performance Networking - Ships optimized abstractions for executing low-latency and high-throughput network input and output operations.
- Arena-Based Memory Management - Implements specialized memory arenas that allocate contiguous blocks to minimize fragmentation and allocation overhead.
- C++ Memory Suites - Provides specialized memory arenas and optimized string and vector implementations to reduce allocation overhead.
- Arena Allocators - Implements arena allocators that use pre-allocated pools to reduce fragmentation and allocation overhead.
- Lock-Free Atomic Containers - Offers a variety of lock-free atomic containers designed to outperform general-purpose thread-safe data structures.
- Optimized Storage Containers - Replaces standard strings and vectors with specialized versions that optimize memory and performance.
- Systems Engineering Toolkits - Provides robust system-level tools including memory arenas and subprocess management for C++ environments.
- Concurrency Primitives - Provides fundamental lock-free atomic structures and synchronization primitives for multi-threaded execution.
- Asynchronous Programming - Implements a high-performance framework for managing deferred computations using promises and futures.
- Standard Library Extensions - Acts as a high-performance extension to the C++ Standard Library for large-scale production environments.
- Lock-Free Concurrent Queues - Provides a suite of lock-free atomic containers to enable high-performance thread-safe data management.
- JSON Serialization - Includes high-performance utilities for converting internal data structures to and from JSON format.
- Performance Benchmarking - Provides tools to execute code segments at scale to generate timing reports and performance metrics for optimization.
- Subprocess Management - Spawns and manages system subprocesses to execute external commands and handle their input and output streams.
- Single-Producer Single-Consumer Queues - Implements high-performance SPSC bounded queues for low-latency message passing between threads.
- IO Abstractions - Offers high-throughput input and output abstractions and system subprocess management for performance-critical services.
- Concurrent Queues - Provides high-performance bounded concurrent queues and chained pipelines to coordinate data flow between producers and consumers.
- Application Performance Monitoring - Tracks system statistics using counters and histograms to identify performance bottlenecks and monitor application health.
- System Statistics Collection - Tracks time series counters, gauges, and histograms to calculate mean and variance in a single pass.
- C++ Frameworks and Libraries - Open-source C++ library suite for high-performance systems.
- Core Frameworks - Library of optimized C++ components used at scale.
- Engineering Components - Core C++ library components.
- Frameworks - Collection of C++ library components from Facebook.
- Frameworks and Libraries - Library of optimized components used by Facebook.
- General C++ Frameworks - Open-source C++ library collection from Facebook.
- Standard Libraries - High-performance library of core components used in large-scale systems.
- Utility Libraries - Collection of C++ library components from Facebook.
