The official source reports this update: b10730: qwen4exp: sum the indexer heads by slices. qwen4exp: sum the indexer heads by slices ( #28023 ) qwen4exp: sum the indexer heads by slices The head reduction went through a transpose and a sum_rows over ne[1], which left sum_rows with ne0 = 4, one block per row for a four element reduction, and the transpose copied the whole block by token surface twice on the way in. The heads are adjacent on ne[1], so each one is a strided view and the sum is a short chain of adds. RTX PRO 6000, Qwen3.8-Flash-Next UD-Q4_K_XL, fa on, 55k context, warm runs on top of #28011 : prompt processing 2170 -> 2366 t/s Generation is unaffected.
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Qwen4exp reduces prompt processing time by 9.03% on RTX PRO 6000.
The RTX PRO 6000 saw prompt processing increase from 2170 to 2366 tokens per second.
2 Sept 20261 verified claims1 sources1 observations
This official update documents a development concerning b10730: qwen4exp: sum the indexer heads by slices. Its practical significance depends on the scope and evidence stated by the source.
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