alibaba/PhotonLibOS

Health v2 · maintenance only

Adoption not part of the score

1225 stars · 178 forks observed · 2026-09-03

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

PhotonLibOS is a high-performance C++ library providing a stackful coroutine runtime with a symmetric scheduler and non-blocking IO engines including io_uring. It offers networking, filesystem, HTTP, and RPC modules with POSIX-compatible APIs, and can run on a userspace TCP/IP stack over DPDK.

Use cases

• write high-performance async C++ servers without callback hell
• convert multithreaded C++ code like RocksDB to coroutines
• build fast RPC services with zero-copy serialization
• do async file and network IO with io_uring
• run networking on a userspace TCP/IP stack with DPDK
• port async code across Linux and macOS on x86 and ARM

When to choose

• you need maximum coroutine performance in C++ with low context-switch overhead
• you want POSIX/std-compatible APIs to integrate into legacy codebases
• you need io_uring or DPDK-backed async IO
• you want HTTP and RPC modules built into the coroutine runtime

When to avoid

• you work in a language other than C++
• you need a full-featured application framework rather than a systems library
• your team is unfamiliar with stackful coroutines and assembly-level runtime details
• you need Windows support

Facets

library · maturity active

concurrency http-server rpc serialization file-system networking developer-tools performance microservices backend cpp cross-platform coroutine stackful-coroutine async-io io-uring libos high-performance dpdk linux macos

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markdown · JSON · MCP: product_card(name="alibaba/PhotonLibOS")