The Leiden Algorithm: How GraphRAG Finds Order Inside Knowledge Graphs
From modularity and Louvain's disconnected-communities bug to Leiden's refinement phase, and why GraphRAG bets on it.
Notes
Notes I write to think more clearly, mostly on systems and performance. RSS · Atom.
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drag · scroll to zoom · click a node to openWriting C++ the Machine Can Run Fast
Cache locality, branch prediction, why the stack is cheap, what optimization flags actually do, and why the size of a variable matters. Notes on the gap between source and silicon.
The Many Flavours of Constness in C++
const, const_cast, constexpr, consteval, constinit. What each one promises, how the compiler sees it, and when work moves from runtime to compile time.
SWAR Parsing Internals
How SIMD-Within-A-Register turns ordinary 64-bit integers into 8-lane parallel byte processors.
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