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Articles and videos contributed by both experts, companies and passionate developers from the OCaml community. From in-depth technical articles, project highlights, community news, or insights into Open Source projects, the OCaml Planet RSS feed aggregator has something for everyone.

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Tarides 233 Anil Madhavapeddy's Blog 223 Watch OCaml 204 Caml Weekly News 190 OCamlPro 170 Marc Elvers 149 Jane Street Tech Blog 125 MirageOS 79 Coq 78 Frama-C 76 Robur Cooperative 70 Caml INRIA 53 Jon Ludlam's Blog at recoil.org 53 Daniel Bünzli 42 David Allsopp's Blog 32

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opam 290 compiler 202 mirageos 197 dune 193 functional programming 165 unikernel 134 ppx 133 async 125 multicore 124 parser 120 odoc 119 eio 117 functor 116 effect 107 merlin 107 domain 105 lwt 105 monad 101 js_of_ocaml 91 concurrency 88

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2026 333 2025 436 2024 307 2023 245 2022 149 2021 197 2020 145 2019 118 2018 110 2017 103 2016 100 2015 107 2014 137 2013 99 2012 60 2011 52 2010 72 2009 35 2008 19 2007 9 2006 3 2005 4 2004 4 2003 2 2002 2

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Anil Madhavapeddy 237 Tarides 232 Unknown 213 Caml Weekly News 183 Mark Elvers 149 Jane Street Tech Blog 113 Coq 78 Frama-C 74 Jane Street 71 Robur Cooperative 70 Jon Ludlam 54 Caml INRIA 53 Daniel Bünzli 42 Bozhidar Batsov 29 Mathématiques et informatique - Collège de France 28

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Filtering by: Source: Marc Elvers (remove) Keyword: compiler (remove) Clear all
Day10: local development builds

My typical OCaml development workflow starts with git clone ..., then opam switch create . 5.4.1 --deps-only followed by dune build. This creates a local _opam directory containing the compiler and all dependencies. It works well, but the _opam directories add up, and the build takes time.

build cache compiler day10 dune layers local opam opam-repository opam_repository

17 Apr 2026

Marc Elvers

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Keeping your branch up-to-date

My Arm32 branch will quickly go stale and will need to be rebased and tested. Can GitHub Actions do that for me automatically?

actions-runner-linux-arm-2 branch compiler config configuration curl echo runner tar validate

01 Dec 2025

Marc Elvers

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OCaml 5.4 native Arm32 branch

Recently, I have been using my Pi Zero (armv6), which has reminded me that OCaml 5 dropped native 32-bit support, and I wondered what it would take to reinstate it.

arm32 armv6 bench byte compiler git multicore native opt slowest

27 Nov 2025

Marc Elvers

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