Larry Dial(@classiclarryd):New NanoGPT Speedrun WR at 79.7 (-1.5s) from @TrianX , with a brilliant solution to hash collisions on the bigram hash embedding. Instead of every bigram in a bucket returning the same embed, a secondary hash gives each bigram its own ±1 sign pattern (one of 8192), applied element-wise, e.g. x·[1,−1,1,1,…]. Each bigram in the bucket then reads a different partial reflection of the one stored row.

Larry Dial

@classiclarryd

Technical Staff at Open Athena, working on Marin

Joined May 2024

48 Following 2.2K Followers

Larry Dial@classiclarryd

2026.06.06 00:54

New NanoGPT Speedrun WR at 79.7 (-1.5s) from @TrianX , with a brilliant solution to hash collisions on the bigram hash embedding. Instead of every bigram in a bucket returning the same embed, a secondary hash gives each bigram its own ±1 sign pattern (one of 8192), applied element-wise, e.g. x·[1,−1,1,1,…]. Each bigram in the bucket then reads a different partial reflection of the one stored row.