The OCaml Planet

Intel Processor Trace is a hardware technology that can record allprogram execution flow along with timing information accurate toaround 30ns. As far as I ca...

Stephen Dolan works on Jane Street’s Tools and Compilers team where he focuses on the OCaml compiler. In this episode, Stephen and Ron take a trip down memory lane, discussing how to manage computer memory efficiently and safely. They consider trade-offs between reference counting and garbage collection, the surprising gains achieved by prefetching, and how new language features like local allocation and unboxed types could give OCaml users more control over their memory. Some links to topics that came up in the discussion: Stephen’s command-line JSON processor, jq: https://github.com/stedolan/jq Stephen’s Cambridge dissertation, “Algebraic Subtyping”: https://www.cs.tufts.edu/~nr/cs257/archive/stephen-dolan/thesis.pdf and a protoype implementation of mlsub: https://github.com/stedolan/mlsub, a language based on those ideas. A post from Stephen on how to benchmark different memory allocators: https://blog.janestreet.com/memory-allocator-showdown/ A Jane Street tech talk on “Unboxed Types for OCaml”: https://www.janestreet.com/tech-talks/unboxed-types-for-ocaml/ An RFC in the OCaml RFC repo: https://github.com/ocaml/RFCs/blob/881b220adc1f358ab15f7743d5cd764222ab7d30/rfcs/unboxed-types.md A paper from Stephen and KC Sivaramakrishnan (https://kcsrk.info/) called “Bounding Data Races in Space and Time”, which is all about a new and better memory model for Multicore OCaml: https://kcsrk.info/papers/pldi18-memory.pdf Another paper describing the design of OCaml’s multicore GC: https://arxiv.org/pdf/2004.11663.pdf The Rust RFC for Higher-ranked trait bounds: https://rust-lang.github.io/rfcs/0387-higher-ranked-trait-bounds.html You can find the transcript for this episode and all past episodes at signalsandthreads.com.

Stephen Dolan works on Jane Street’s Tools and Compilers team where he focuses on the OCaml compiler. In this episode, Stephen and Ron take a trip down memory lane, discussing how to manage computer memory efficiently and safely. They consider trade-offs between reference counting and garbage collection, the surprising gains achieved by prefetching, and how new language features like local allocation and unboxed types could give OCaml users more control over their memory. Some links to topics that came up in the discussion: Stephen’s command-line JSON processor, jq: https://github.com/stedolan/jq Stephen’s Cambridge dissertation, “Algebraic Subtyping”: https://www.cs.tufts.edu/~nr/cs257/archive/stephen-dolan/thesis.pdf and a protoype implementation of mlsub: https://github.com/stedolan/mlsub, a language based on those ideas. A post from Stephen on how to benchmark different memory allocators: https://blog.janestreet.com/memory-allocator-showdown/ A Jane Street tech talk on “Unboxed Types for OCaml”: https://www.janestreet.com/tech-talks/unboxed-types-for-ocaml/ An RFC in the OCaml RFC repo: https://github.com/ocaml/RFCs/blob/881b220adc1f358ab15f7743d5cd764222ab7d30/rfcs/unboxed-types.md A paper from Stephen and KC Sivaramakrishnan (https://kcsrk.info/) called “Bounding Data Races in Space and Time”, which is all about a new and better memory model for Multicore OCaml: https://kcsrk.info/papers/pldi18-memory.pdf Another paper describing the design of OCaml’s multicore GC: https://arxiv.org/pdf/2004.11663.pdf The Rust RFC for Higher-ranked trait bounds: https://rust-lang.github.io/rfcs/0387-higher-ranked-trait-bounds.html You can find the transcript for this episode and all past episodes at signalsandthreads.com.

Slack integrations for GitHub don’t work well with monorepos, so we built one that does. Now you can use it, too.

Sean Grove Founder of OneGraph If you'd like to support the show for more content about OCaml, Reason and ReScript you can now do so at https://www.patreon.com/emelletv or by sending any tez amount to emelletv.tez (tz1bQHQKT4BSoEreWKHuR3H5mme6fV3XCcvX) Watch live at https://www.twitch.tv/emelletv

Sean Grove Founder of OneGraph If you'd like to support the show for more content about OCaml, Reason and ReScript you can now do so at https://www.patreon.com/emelletv or by sending any tez amount to emelletv.tez (tz1bQHQKT4BSoEreWKHuR3H5mme6fV3XCcvX) Watch live at https://www.twitch.tv/emelletv

Sean Grove Founder of OneGraph If you'd like to support the show for more content about OCaml, Reason and ReScript you can now do so at https://www.patreon.com/emelletv or by sending any tez amount to emelletv.tez (tz1bQHQKT4BSoEreWKHuR3H5mme6...

Gabriel "Drup" Radanne researcher at Inria in the CASH research team If you'd like to support the show for more content about OCaml, Reason and ReScript you can now do so at https://www.patreon.com/emelletv or by sending any tez amount to emelletv.tez (tz1bQHQKT4BSoEreWKHuR3H5mme6fV3XCcvX) Watch live at https://www.twitch.tv/emelletv