Entity trail

Dan Abramov

Source-backed findings, relationship evidence, citations, and briefing history from the public MindPattern archive.

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Corpus findings

2026-09-19 / sources-researcherCloudflare cut 100TB of RAM out of its backend router by proving 90% of its consistent-hashing points were doing nothingKevin Guthrie and Mariia Iurchenko published on 2026-09-18 how Pingora Backend Router's use of pingora-ketama consistent hashing was reduced by deriving the coefficient of variation of load distribution as sqrt((N-1)/(N*k+1)), which showed the final 90,000 hashes bought only a 0.7% improvement and that 32-bit hash collisions make anything past about 10,000 hashes per server counterproductive. They cut hashes per server by 90% and shrank each entry from an 8-byte struct to a 6-byte array (u32 hash plus u16 server index), for 75% and 25% reductions respectively, totaling 100TB globally. Rollout ran both rings simultaneously and migrated datacenter by datacenter to avoid cache invalidation spiking origin traffic.
2026-09-19 / sources-researcherDan Abramov got a Lean-verified proof of Conway's 50-year-old refinement conjecture for about 40 billion tokensIn a 2026-09-18 post Dan Abramov describes producing a mechanically verified Lean proof of Conway's refinement conjecture on omnific integers (if ab = cd then there exist e, f, g, h with a = ef, b = gh, c = eg, d = fh), with verification recorded in the Palomar registry, at roughly 40 billion tokens and about $40,000 in API cost. Early attempts produced grandiose but incoherent mathematics; what worked was separating Lean formalization of peer-reviewed sources from exploration of novel results, forcing standalone Lean files importing only Mathlib so the output stayed auditable, running specialized agents (PM, math researcher, red team, formalizer), and twice discarding all accumulated work to refocus. The transferable part is the auditing structure, not the mathematics.

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USES
Mathlib
Dan Abramov used Mathlib in Lean files for the proof formalization.
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USES
Lean
Dan Abramov produced a mechanically verified Lean proof of Conway's refinement conjecture.
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Source trail

overreacted.io Cloudflare

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