Fasthttp is a high-performance networking framework for Go, designed to maximize throughput and minimize memory overhead in demanding web applications. It functions as a specialized HTTP server and client library that prioritizes efficient resource management, allowing developers to build scalable services capable of handling massive concurrent traffic with minimal garbage collection pressure.
The library distinguishes itself through a focus on zero-allocation processing and low-level optimization. It achieves this by recycling temporary request and response objects through managed pools and utilizing unsafe memory pointers to perform data conversions without redundant allocations. To further enhance performance, the framework employs worker-per-core listener scaling, which distributes incoming network connections across multiple CPU cores to reduce processing latency under heavy load.
Beyond its core serving capabilities, the project provides a comprehensive suite of tools for managing network traffic and application state. This includes support for protocol upgrades like WebSockets, in-memory connection bypassing for inter-process communication, and robust request handling features such as automatic compression, static file delivery, and configurable timeouts. It also incorporates security-focused utilities, including context-aware template rendering and anti-denial-of-service limits, to maintain stability in production environments.
