According to Boris Cherny on X, an enterprise customer running Claude Code on one of the world's largest codebases reported @-mentions are now 3x faster, as reported by his post on Apr 9, 2026. According to Boris Cherny, the speedup stems from indexing and retrieval optimizations that reduce symbol lookup latency in massive monorepos, improving developer workflow and reducing context window overhead for LLM-assisted coding. As reported by Boris Cherny, these improvements translate into lower compute costs and faster code navigation at scale, creating business value for enterprises adopting AI pair-programming across monorepos and microservices.