Custom C++ Backend Cuts LLM Padding, Boosts GPU Throughput Up to 5.9×
The author builds WarpGroup‑Backend, a C++ inference engine that packs variable‑length sequences to eliminate padding, letting GPUs avoid wasted compute on zeroes. Benchmarks show a 2.08× speedup on an H100 and 5.89× on a GTX 1080, with no out‑of‑memory crashes. The guide includes code and instructions for integrating the engine.