BEN EBSWORTH
INFRA | SOFTWARE | HARDWARE
Latest writing
All posts →Software
Four ways to shrink a KV cache
A transformer's KV cache is a four-dimensional tensor, and every compression trick — quantisation, eviction, cross-layer sharing, linear attention — attacks one of its axes. Here is the tour, and the cautionary tale of a tiny code model whose accuracy fell 20 points because a smoke test never exercised the one axis that bites.
Software
A* Search, Visually: the Heuristic Is the Whole Game
A* is not a clever algorithm so much as Dijkstra plus a bet about the future. The same code becomes Dijkstra, greedy best-first, or A* depending on one term in the priority key — and admissibility is the single property that buys optimality.
Electrical Eng
AM, FM, QAM: A Tour of the Modulation Zoo
Every modulation scheme is the same act — painting information onto a carrier — and they differ only in which property of the carrier you paint on. Plotted as a constellation, AM is a line, FM is a circle, and QAM is a grid.
From the lab
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