Four months after the release of OCaml 5.0.0, the set of new features for the future version 5.1.0 of OCaml has been frozen. I am thus happy to announce the first alpha release for OCaml 5.1.0 . This alpha version is here to help fellow hackers join us early in our bug hunting and opam ecosystem…

Thanks for the release! Is the new compression feature enabled by default or do I have to specify an option? If so which one?

Compression is enabled by default for the compiler intermediary artifacts (cmi/cmt/cmo/cma files). More generally, compression is enabled through a new Marshal flag.

Ah, yes the size difference is noticeable :slight_smile: ❯ du -sch ~/.opam/5.1.0\~alpha1/lib/ocaml 137M ~/.opam/5.1.0~alpha1/lib/ocaml 137M total ❯ du -sch ~/.opam/5.0.0\~beta1/lib/ocaml 222M ~/.opam/5.0.0~beta1/lib/ocaml 222M total

[image] octachron: where option_list is a comma separated list of ocaml-option-* packages. This should say space-separated, comma-separated doesn’t work (the example below got it right).

First alpha release of OCaml 5.1.0

Ecosystem

copy April 16, 2023, 8:47am 5

This should say space-separated, comma-separated doesn’t work (the example below got it right).

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First alpha release of OCaml 5.1.0

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