The AI Reader.
Wednesday, September 16, 202648 min read
Working Knowledge · The Evidence

FlashAttention does more arithmetic to move less data

Dao and coauthors' 2022 paper tiles the score matrix through a GPU's on-chip memory, cutting one training configuration's HBM traffic from 40.3GB to 4.4GB and its runtime from 41.7 to 7.3 milliseconds.

10 min read7 sources
Working Knowledge · The Mechanics

Millions of watermarked stock photos teach image generators to draw one of their own

A diffusion model learns the regularities across billions of training photos, and a stock-photo mark common enough in that data becomes one of them, a mechanism distinct from the rarer case where a model reproduces one training photo almost whole.

10 min read9 sources
Working Knowledge · What Could Go Wrong

AI's outcome worse than extinction borrows its scale math from an essay that never mentions suffering

Researchers studying AI's worst-case suffering risk reuse Nick Bostrom's 2003 math for the cost of delayed space colonization to argue a fast-moving optimizer might accept suffering as the price of speed.

10 min read12 sources
Working Knowledge · The Instruments

A mean opinion score doesn't travel between tests

The same three synthetic voices from a 2013 listening test scored a full point lower on a five-point scale when researchers replayed the identical recordings eight years later next to newer systems, though the ranking between them never moved.

9 min read10 sources
Working Knowledge · When AI Breaks

Facebook delivered identically targeted job ads to audiences 90% male and 85% female

Facebook’s own delivery system produced the skew, invisible to the advertisers until a controlled study isolated it.

9 min read8 sources