The A.I. Daily
Building GPT-2 KV Cache from Scratch and Measuring Performance
A developer implemented a KV cache for GPT-2 small from scratch in PyTorch and measured latency and memory. At context length 1000, caching reduced per-token time from 29.69 ms to 4.95 ms, and generating 1016 tokens from 14.66 s to 5.03 s. Cached and uncached greedy generation matched over 200 tokens.