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Top 23 C++ high-performance-computing Projects
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Project mention: Show HN: Coros – A Modern C++ Library for Task Parallelism | news.ycombinator.com | 2024-09-25
Martin, have you had a look at https://github.com/taskflow/taskflow ?
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JetBrains
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FluidX3D
The fastest and most memory efficient lattice Boltzmann CFD software, running on all GPUs and CPUs via OpenCL. Free for non-commercial use.
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thread-pool
BS::thread_pool: a fast, lightweight, modern, and easy-to-use C++17 / C++20 / C++23 thread pool library
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kokkos
Kokkos C++ Performance Portability Programming Ecosystem: The Programming Model - Parallel Execution and Memory Abstraction
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AdaptiveCpp
Compiler for multiple programming models (SYCL, C++ standard parallelism, HIP/CUDA) for CPUs and GPUs from all vendors: The independent, community-driven compiler for C++-based heterogeneous programming models. Lets applications adapt themselves to all the hardware in the system - even at runtime!
Project mention: AdaptiveCpp – Implementation of SYCL and C++ Parallelism for CPUs and GPUs | news.ycombinator.com | 2025-01-02 -
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InfluxDB
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envpool
C++-based high-performance parallel environment execution engine (vectorized env) for general RL environments.
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preCICE
A coupling library for partitioned multi-physics simulations, including, but not restricted to fluid-structure interaction and conjugate heat transfer simulations.
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aphros
Finite volume solver for incompressible multiphase flows with surface tension. Foaming flows in complex geometries.
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qmcpack
Main repository for QMCPACK, an open-source production level many-body ab initio Quantum Monte Carlo code for computing the electronic structure of atoms, molecules, and solids with full performance portable GPU support
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Sevalla
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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++ high-performance-computing discussion
C++ high-performance-computing related posts
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AdaptiveCpp – Implementation of SYCL and C++ Parallelism for CPUs and GPUs
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AdaptiveCpp: Implementation of SYCL and C++ CPUs and GPUs
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AdaptiveCpp – SYCL implementation to run C++ on CPUs and GPUs
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The Way We Are Building Event-Driven Applications Is Misguided
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AdaptiveCpp
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What Every Developer Should Know About GPU Computing
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Huge LibRapid Update -- New Features, Performance Improvements and Bug Fixes
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A note from our sponsor - InfluxDB
www.influxdata.com | 1 Sep 2025
Index
What are some of the best open-source high-performance-computing projects in C++? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | Taskflow | 11,183 |
| 2 | FluidX3D | 4,631 |
| 3 | thread-pool | 2,640 |
| 4 | kokkos | 2,299 |
| 5 | mfem | 1,956 |
| 6 | AdaptiveCpp | 1,685 |
| 7 | Trilinos | 1,310 |
| 8 | envpool | 1,183 |
| 9 | preCICE | 824 |
| 10 | amrex | 652 |
| 11 | thread-pool | 524 |
| 12 | relion | 489 |
| 13 | aphros | 428 |
| 14 | qmcpack | 355 |
| 15 | vuh | 350 |
| 16 | feelpp | 324 |
| 17 | ADIOS2 | 299 |
| 18 | intel-qs | 250 |
| 19 | OpenCL-Benchmark | 242 |
| 20 | librapid | 173 |
| 21 | mpl | 173 |
| 22 | vpic | 164 |
| 23 | dftfe | 144 |
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