Using a static data memeberInstead of implementing the singleton pattern using a block local static variable, you can go for a private static data member. Time to see how this implementation behaves. Here is my implementation where I kept the labels stable:
Every language has limitations. The lack of straightforward, all-powerful code generation was my primary gripe with C++.
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Copied to clipboard。手游是该领域的重要参考
And this war has also disrupted the flow of liquefied natural gas from Qatar, which controls almost 20% of the global market. That also affects the world economy and supply chains. And shortages of natural gas affect production of fertilizer and aluminium, as well as other key materials.。业内人士推荐超级权重作为进阶阅读
My best theory: the fused standard path wins because XLA sees the entire softmax(Q @ K.T) @ V expression at once and compiles it into one optimized kernel — no intermediate matrices spilling to HBM. My flash attention uses fori_loop, which XLA likely compiles as a generic sequential loop. It probably can’t fuse across iterations, can’t pipeline memory loads, can’t interleave independent work. (I haven’t dumped the HLO to verify this — it’s an inference from the benchmark numbers and XLA’s documented behavior.)