Deep Dive: How JetBrains Fleet Indexes 1M Line Codebases with Rust 1.85 and Kotlin 2.0

Indexing a 1,000,000-line Java codebase in under 800ms with 40% lower memory overhead than traditional IntelliJ IDEA indexing isn’t magic—it’s a deliberate, Rust 1.85-powered, Kotlin 2.0-orchestrated architecture that JetBrains spent 3 years building for Fleet. 🔴 Live Ecosystem Stats ⭐ rust-lang/rust — 112,402 stars, 14,826 forks Data pulled live from GitHub and npm. 📡 Hacker News Top Stories Right Now Ghostty is leaving GitHub (2020 points) Before GitHub (336 points) Bugs Rust won't catch (47