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The Deepity C++ library implements optimized Predictive Coding Networks to achieve near-backpropagation performance on MNIST, with 97.73% accuracy in 59.5 seconds.
A developer reports achieving 92.32% accuracy on the MNIST dataset in 17.6 seconds using a binary XNOR ensemble model on an AMD Ryzen CPU, demonstrating significant speed improvements over traditional floating-point CNNs.