A comprehensive recap of P99 CONF 2025 covering tail latency optimization, systems programming, and database performance. Key themes included taming P99 latency across various systems (PayPal, TigerBeetle), widespread Rust adoption for performance-critical rewrites (SQLite, ClickHouse, Neon), database innovations in ScyllaDB and others, advanced testing with deterministic simulation, eBPF-based observability tooling, and the emerging frontier of LLM inference optimization and vector search performance. The conference featured 60+ talks from engineers worldwide sharing real-world performance engineering experiences.
Table of contents
Starting with low latencyRust was everywhere (again)On the database and storage sidePerformance engineering, testing, and observabilityAnd then there’s AI and ML, the new frontierSort: