Flambda2
Next-generation compiler optimization for OCaml. Co-developed with Jane Street to deliver exceptional performance in the most demanding production environments, where every microsecond counts.
How Flambda2 optimizes your code
Advanced Inlining & Specialization
Flambda2 performs aggressive cross-module inlining and function specialization, eliminating abstraction overhead while preserving code clarity and modularity.
Unboxing & Data Representation
Automatically unboxes values and optimizes data layout to reduce allocation pressure and improve cache performance. This is critical for latency-sensitive systems.
Whole-Program Optimization
Analyzes the entire program to find optimization opportunities that local analysis would miss. Dead code elimination, constant propagation, and closure conversion at scale.
Production-Grade Reliability
Battle-tested at Jane Street across billions of dollars in daily trades. Flambda2 delivers performance gains without compromising the stability required for mission-critical systems.
Trusted by Jane Street
Jane Street is one of the world's most sophisticated technology-driven trading firms, processing billions of dollars in daily trades across global markets.
Mission-Critical Performance
In algorithmic trading, microseconds matter. Jane Street deployed Flambda2 in production to achieve the performance gains necessary to stay competitive in global financial markets.
Scale and Reliability
Jane Street processes billions of dollars in trades daily. They trust Flambda2 to optimize their systems while maintaining the reliability and stability required for production financial systems.
Strategic Investment
Jane Street co-developed Flambda2 with Titagone, demonstrating their commitment to advancing compiler technology as a strategic advantage in their business operations.
Flambda2 in production
Frequently asked questions
What is Flambda2?
Flambda2 is a next-generation compiler optimization framework for OCaml, co-developed with Jane Street. It performs advanced inlining, specialization, unboxing, and whole-program analysis to deliver exceptional runtime performance.
How much performance improvement can I expect?
Flambda2 delivers up to 20% performance gains on real-world OCaml applications. It is battle-tested at Jane Street across systems handling billions of dollars in daily trades where every microsecond counts.
Is Flambda2 compatible with standard OCaml?
Yes. Flambda2 is an optimization pass within the OCaml compiler. Your existing OCaml code benefits from its optimizations without requiring source-level changes.
Who maintains Flambda2?
Flambda2 is co-developed by Titagone (formerly OCamlPro) and Jane Street, combining deep compiler expertise with the demands of production-critical trading infrastructure.