🚀HardInference OptimizationPREMIUM

FlashAttention & Memory Efficiency

Understand how FlashAttention achieves O(n) memory by tiling and online softmax, and analyze its IO complexity.

What you'll master

Standard attention memory bottleneck

Tiling strategy for SRAM utilization

Online softmax algorithm

IO complexity analysis (HBM reads/writes)

FlashAttention-2 improvements

Causal masking in tiled attention

Backward pass recomputation

Warp-level parallelism

Triton vs CUDA implementation trade-offs

Hard35 min readIncludes code examples, architecture diagrams, and expert-level follow-up questions.

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