UMBRA

24 notes filed under UMBRA, newest first. Same rules as the rest of the pile: a codename, a theme, and no internals.

codename UMBRA · 24 notes · 24 themes · all codenames

all themes addressing-semantics 1 admission-control 1 api-shape 1 compatibility-planning 1 constant-time-sampling 1 data-layout 1 documentation-authority 1 execution-model 1 honest-limit 1 isolation 1 licensing 1 measurement 1 measurement-discipline 1 module-boundaries 1 proof-honesty 1 protocol-evolution 1 research-refutation 1 research-trials 1 semantic-porting 1 silent-failure 1 specification-audit 1 transport-identity 1 verification-coverage 1 verification-honesty 1

UMBRA · measurement-discipline · 2 min read

the optimisation that is slower, kept on purpose

The core loop of a memory-hard puzzle generator is a trimming pass: visit a very large edge set repeatedly, drop nodes that have only one neighbour, stop when nothing changes. Each pass needs counts per region, and the counts have to be…

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Each codename is a project. The theme is the class of problem the note is about — the same theme recurs across projects, which is usually the interesting part.

ABACUS 60 FLINT 12 KEEL 24 LARDER 24 LATTICE 36 MERIDIAN 24 MISE 24 SCRIBE 12 TROUPE 12 UMBRA 24 browse 244 themes

UMBRA

UMBRA notes

the optimisation that is slower, kept on purpose

Other codenames