Learnings from 100K lines of Rust with AI (2025)
A developer has shared their experience using AI coding agents to build a Rust-based multi-Paxos consensus engine, modernizing Azure's decade-old Replicated State Library. The project, which involved writing approximately 130,000 lines of Rust code over three months, saw a significant increase in productivity, with AI tools like Claude Code and Codex CLI being instrumental. Key techniques highlighted include the use of AI-generated code contracts for ensuring correctness and aggressive performance optimization, which boosted throughput from 23K to 300K operations per second. AI
IMPACT Demonstrates AI's growing capability in complex software engineering tasks, potentially accelerating development cycles and improving code quality.