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Dev.to
7/19/2026
Building a Deep Learning Framework in C++ and CUDA: Benchmarking Against PyTorch

Building a Deep Learning Framework in C++ and CUDA: Benchmarking Against PyTorch

Original: I Built a Deep Learning Framework from Scratch in C++ and CUDA (And Beat PyTorch's Speed Multiple Run)

Short summary

A developer built Aakaar, a deep learning framework from scratch in C++ and CUDA with a Python wrapper, featuring 18 loss modules and 11 custom optimizers with manual memory management. Benchmarked against PyTorch on EMNIST over 5 epochs, Aakaar achieved 127.76s (83.30% acc) vs PyTorch's 131.23s (82.55% acc), edging out PyTorch by bypassing Python runtime overhead. The framework is open-source and the author seeks feedback from systems engineering and AI infrastructure communities.

  • Built Aakaar, a C++/CUDA deep learning framework with Python wrapper from scratch
  • Benchmarked against PyTorch on EMNIST: 127.76s vs 131.23s with comparable accuracy
  • Key challenge was manual memory contiguity management during backpropagation without autograd

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