google/marl

Health v2 · maintenance only

Flags: no_releases archived

Adoption not part of the score

2000 stars · 204 forks observed · 2026-08-28

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

Marl is a hybrid thread/fiber task scheduler library written in C++11 that lets you run tasks across a fixed pool of hardware threads. It uses fibers so tasks can block without wasting threads, and it has no external dependencies.

Use cases

• schedule many tasks across a fixed thread pool in C++
• run blocking tasks efficiently without spawning extra threads
• parallelize workloads with fibers and coroutines in C++11
• build a task runner for cross-platform C++ applications
• coordinate async tasks with events and wait groups
• compile a task scheduler to WebAssembly with Emscripten

When to choose

• you need efficient blocking-friendly task scheduling in C++ with zero dependencies
• you want a lightweight, portable scheduler across desktop, mobile, and wasm targets
• your workload has many tasks that block and you want to keep hardware thread usage fixed

When to avoid

• you need a general-purpose async I/O runtime or event loop rather than a task scheduler
• you are not writing C++ or need higher-level parallelism primitives built into the language
• you need GPU or distributed parallelism rather than single-process task scheduling

Facets

library · maturity stable

concurrency scheduling developer-tools performance cross-platform cpp windows wasm cross-platform fibers task-scheduler thread-pool coroutines c++11 parallelism linux macos android ios

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