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Andrew Drakeford

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Lightning Talk: Pólya Performance ThinkingC++ on Sea 20252025-06-23
Apply Polya’s four steps to real performance tradeoffs: understand and restate the context (requirements, data, unknown final design), then devise a plan using…
Lightning on
Lightning Talk: Simple Compile Time Dynamic ProgrammingC++ on Sea 20252025-06-23
Uses constexpr functions with plain arrays and loops to run bottom-up dynamic programming at compile time, building a DP cost matrix and a split-point matrix…
Lightning on
C++ Sequential Considered HarmfulACCU 20242024-04-17
Adds 10 billion 0-to-1 random numbers with a plain for loop, std::accumulate and std::reduce and they all agree but the result is wrong; pruning or permuting…
Lightning on
Lightning Talk: Use SIMD Pairwise Reduction in C++!C++Online 20242024-02-28
Experiments adding 10 billion doubles show scalar sequential accumulation runs at about 12% efficiency and produces wildly different sums when inputs are…
Lightning on
Fast C++ by using SIMD Types with Generic Lambdas and FiltersCppCon 20222022-09-11
A small framework implements contiguous aligned padded vectors (VACXX), generic lambdas and filters/views and generates dense AVX2/AVX512 intrinsics; it claims…
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