REDESIGNING SOURCE CONTROL AT ANTHROPIC

Summary from the TLDR Data newsletter

Anthropic replaced Git with Scion, an in-house version control system built in five months, after daily code merges grew from 2,500 to over 30,000. By moving operations to servers and fetching only the files needed, it reports roughly 100 times faster checkouts and 200 times lower CPU and memory requirements than its previous Git mirror infrastructure.