HyperGraphX: Graph Transductive Learning with Hyperdimensional Computing and Message Passing

We present a novel algorithm, hdgc, that marries graph convolution with binding and bundling operations in hyperdimensional computing for transductive graph learning. For prediction accuracy hdgc outperforms major and popular graph neural network implementations as well as state-of-the-art hyperdimensional computing implementations for a collection of homophilic graphs and heterophilic graphs. Compared with the most accurate learning methodologies we have tested, on the same target GPU platform, hdgc is on average 9561.0 and 144.5 times faster than gcnii, a graph neural network implementation and HDGL, a hyperdimensional computing implementation, respectively. As the majority of the learning operates on binary vectors, we expect outstanding energy performance of hdgc on neuromorphic and emerging process-in-memory devices.