JuliaCon 2025

Reactant: Optimize Julia functions with MLIR & XLA
2025-07-25 , Lawrence Room 107 - Method Room

This talk introduces Reactant, a tool for optimizing existing Julia programs through MLIR and XLA. Reactant preserves high level semantics already found in Julia programs (like linear algebra) to enable novel optimizations that cross function boundaries, rewrite programs to effectively execute on any hardware backend (including rewriting CUDA programs to run on thousands of distributed TPUs), and combines with Enzyme to provide high-performance multi-backend differentiation.


This talk introduces Reactant, a tool for optimizing existing Julia programs through MLIR and XLA. Reactant preserves high level semantics already found in Julia programs (like linear algebra) to enable novel optimizations that cross function boundaries, rewrite programs to effectively execute on any hardware backend (including rewriting CUDA programs to run on thousands of distributed TPUs), and combines with Enzyme to provide high-performance multi-backend differentiation.

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