Top 5 C++ multidimensional-array Projects

xtensor

8 3,205 7.9 C++

C++ tensors with broadcasting and lazy computing

Project mention: Does anyone know any good open source project to optimize? | /r/cpp | 2023-06-07

Fastor

5 699 4.1 C++

A lightweight high performance tensor algebra framework for modern C++
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array

4 188 6.9 C++

C++ multidimensional arrays in the spirit of the STL

Project mention: Benchmarking 20 programming languages on N-queens and matrix multiplication | news.ycombinator.com | 2024-01-02

I should have mentioned somewhere, I disabled threading for OpenBLAS, so it is comparing one thread to one thread. Parallelism would be easy to add, but I tend to want the thread parallelism outside code like this anyways.
As for the inner loop not being well optimized... the disassembly looks like the same basic thing as OpenBLAS. There's disassembly in the comments of that file to show what code it generates, I'd love to know what you think is lacking! The only difference between the one I linked and this is prefetching and outer loop ordering: https://github.com/dsharlet/array/blob/master/examples/linea...

librapid

18 152 9.3 C++

A highly optimised C++ library for mathematical applications and neural networks.

Project mention: Huge LibRapid Update -- New Features, Performance Improvements and Bug Fixes | /r/cpp | 2023-08-04

In addition to all of these changes, I used LibRapid and Surge to write a simple Flappy Bird genetic AI as a proof of concept. The code runs well on all platforms and can simulate over 20,000 birds without too much trouble. If you want to check it out, here's the GitHub page: https://github.com/Pencilcaseman/FlappyBirdAI

dynarray

2 14 3.3 C++

A header-only library, VLA for C++ (≥C++14). Extended version of std::experimental::dynarray
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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).