Custom LLM Kernel Optimization in Production: Triton vs. CUDA C++ vs. torch.compile vs. CUTLASS
Serving large language models at scale requires extracting maximum performance from modern GPU architectures like NVIDIA Ampere, Hopper, and Blackwell. While early production deployments relied on standard PyTorch eager execution and standard cuBLAS calls, high-throughput serving systems such as vLLM, SGLang, and TensorRT-LLM depend on specialized fused GPU kernels to eliminate memory bandwidth bottlenecks and saturate Tensor Cores. Engineering teams face four primary paradigms for kernel devel
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