I built a tensor library from scratch in C++/CUDA
Hi HN, Over the past few months, I've been building `dsc`, a tensor library from scratch in C++/CUDA. My main focus has been on getting the basics right, prioritizing a clean API, simplicity, and clear observability for running small LLMs locally. The key features are: - C++ core with CUDA support written from scratch. - A familiar, PyTorch-like Python API. - Runs real models: it's complete enough to load a model like Qwen from HuggingFace and run inference on both CUDA and CPU with a single line change[1]. - Simple, built-in observability for both Python and C++. Next on the roadmap is…
In plain words
DSC is a tensor library built from scratch in C++ with CUDA support, designed for running small language models locally. It offers a PyTorch-like Python API alongside its C++ core, allowing users to load models like Qwen from HuggingFace and run inference on both GPU and CPU. The library emphasizes clean design, simplicity, and built-in observability tools for developers working with machine learning workflows on consumer hardware.
written from the facts on this page · September 2026
From the sources
In the maker’s words, at launch
Hi HN, Over the past few months, I've been building `dsc`, a tensor library from scratch in C++/CUDA. My main focus has been on getting the basics right, prioritizing a clean API, simplicity, and clear observability for running small LLMs locally. The key features are: - C++ core with CUDA support written from scratch. - A familiar, PyTorch-like Python API. - Runs real models: it's complete enough to load a model like Qwen from HuggingFace and run inference on both CUDA and CPU with a single line change[1]. - Simple, built-in observability for both Python and C++. Next on the roadmap is adding BF16 support and then I'll be working on visualization for GPU workloads. The project is still early and I would be incredibly grateful for any feedback, code reviews, or questions from the HN community! GitHub Repo: https://github.com/nirw4nna/dsc [1]: https://github.com/nirw4nna/dsc/blob/main/examples/models/qw...
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