AI2ML AI to Machine Learning

Dec 19, 2025 · Artificial Intelligence

The 9 Key Ideas Behind FlashAttention

FlashAttention accelerates transformer inference by combining nine techniques—including loss‑less attention, GPU memory‑pyramid optimization, SRAM‑reusing tiling, safe softmax scaling, online buffering, tile‑size constraints, parallel multiplication, reduced KV slicing, and integrated backward‑pass caching—to achieve efficient, high‑throughput computation on modern GPUs.