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Top 23 C++ parallel-computing Projects
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Project mention: Adding 70-language translation to an image API without paying per word | dev.to | 2026-06-09
Runtime: CTranslate2 with int8 quantization. This is the key piece. It shrinks the model to ~1.3 GB and runs CPU inference fast. Do not run raw transformers on CPU for this.
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kokkos
Kokkos C++ Performance Portability Programming Ecosystem: The Programming Model - Parallel Execution and Memory Abstraction
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Project mention: Delivering the Missing Building Blocks for Nvidia CUDA Kernel Fusion in Python | news.ycombinator.com | 2025-07-16
There’s an extensive change-log supporting the CCCL 3.0 release on GitHub from 3 hours ago: https://github.com/NVIDIA/cccl/releases/tag/v3.0.0
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Kratos
Kratos Multiphysics (A.K.A Kratos) is a framework for building parallel multi-disciplinary simulation software. Modularity, extensibility and HPC are the main objectives. Kratos has BSD license and is written in C++ with extensive Python interface. (by KratosMultiphysics)
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libfork
A bleeding-edge, lock-free, wait-free, continuation-stealing tasking library built on C++20's coroutines
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coros
An easy-to-use and fast library for task-based parallelism, utilizing coroutines. (by mtmucha)
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ForkUnion
Lower-latency OpenMP-style minimalistic scoped thread-pool designed for 'Fork-Join' parallelism in Rust and C++, avoiding memory allocations, mutexes, CAS-primitives, and false-sharing on the hot path 🍴
As mentioned in the docstring above, using STL's `std::hardware_destructive_interference_size` won't help you. On ARM, this issue becomes even more pronounced, so concurrency-heavy code should ideally be compiled multiple times for different coherence protocols and leverage "dynamic dispatch", similar to how I & others handle SIMD instructions in libraries that need to run on a very diverse set of platforms.
[1] https://github.com/ashvardanian/ForkUnion/blob/46666f6347ece...
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ConcurrentDeque
Fast, generalized, implementation of the Chase-Lev lock-free work-stealing deque for C++17
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Lazy
Light-weight header-only library for parallel function calls and continuations in C++ based on Eric Niebler's talk at CppCon 2019.
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NOTE:
The open source projects on this list are ordered by number of github stars.
The number of mentions indicates repo mentiontions in the last 12 Months or
since we started tracking (Dec 2020).
C++ parallel-computing discussion
C++ parallel-computing related posts
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Myths Programmers Believe about CPU Caches
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Show HN: Coros – A Modern C++ Library for Task Parallelism
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rodin alternatives - mfem and FreeFem-sources
7 projects | 8 Mar 2023 -
Learn PDE constrained optimization
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Open source FEA tools instead of ANSYS Workbench and APDL
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Eighty Years of the Finite Element Method: Birth, Evolution, and Future
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Fortran on GPU
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A note from our sponsor - SaaSHub
www.saashub.com | 21 Jun 2026
Index
What are some of the best open-source parallel-computing projects in C++? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | Taskflow | 12,017 |
| 2 | CTranslate2 | 4,525 |
| 3 | kokkos | 2,572 |
| 4 | cccl | 2,388 |
| 5 | mfem | 2,184 |
| 6 | dealii | 1,679 |
| 7 | Vc | 1,536 |
| 8 | Kratos | 1,289 |
| 9 | dolfinx | 1,148 |
| 10 | libfork | 879 |
| 11 | oneMath | 766 |
| 12 | RAJA | 585 |
| 13 | parlaylib | 437 |
| 14 | coros | 333 |
| 15 | ForkUnion | 332 |
| 16 | feelpp | 330 |
| 17 | PothosCore | 314 |
| 18 | CPURasterizer | 200 |
| 19 | axom | 191 |
| 20 | ConcurrentDeque | 162 |
| 21 | cppRouting | 121 |
| 22 | Lazy | 111 |
| 23 | Bulk | 94 |
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