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Parallel traversal effect handlers for OCaml

This is an idea proposed in 2024 as a Cambridge Computer Science Part II project, and is currently being worked on by Sky Batchelor. It is co-supervised with Patrick Ferris.

Most existing uses of effect handlers perform synchronous execution of handled effects. Xie et al proposed a traverse handler for parallelisation of independent effectful computations whose effect handlers are outside the parallel part of the program. The paper [1] gives a sample implementation as a Haskell library with an associated λp calculus that formalises the parallel handlers.

This project aims to:

Related reading

  1. Parallel Algebraic Effect Handlers describes the traverse effect

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  2. Retrofitting effect handlers onto OCaml, PLDI 2021 describes how the effect system in OCaml works.

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  3. EIO is a high-performance direct-style IO library we have been developing for OCaml.

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# 1st Sep 2024   iconideas effects fp idea-medium idea-ongoing multicore ocaml scheduling

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