Eio
Fewer than 5 people recommend it so far, so there's no written verdict. Here is what commenters said.
3recommend
0warn against
Nov 4, 2025first mention
May 15, 2026latest mention
Why people recommend it
“much easier now with OCaml effects to build custom fast serialisers”
“I use Eio these days to do direct-style IO”
original author of the Lwt/delimcc articleswitched from Lwton “Delimited Continuations vs. Lwt for Threads”
Show 2 more
“migrating my libraries from Lwt to Eio to take advantage of OCaml 5’s direct-style concurrency”
switched from Lwton “Show HN: Lwt-to-Eio – Automated Migration from Lwt t…”
Caveats and dissent
No one in these comments warned against it.
Who recommends it in their own words
Threads where it came up
- O(x)Caml in Space 1 mention
- Delimited Continuations vs. Lwt for Threads 1 mention
- Show HN: Lwt-to-Eio – Automated Migration from Lwt to OCaml 5 Direct Style 1 mention
- Why I love OCaml (2023) 1 mention
- Pain Points of OCaml 1 mention
Data: eio.json. Quotes are verbatim; the verdict and theme labels are written by a model from these comments, and every clause links to its sources.
All comments 5
“much easier now with OCaml effects to build custom fast serialisers”
“I use Eio these days to do direct-style IO”
“migrating my libraries from Lwt to Eio to take advantage of OCaml 5’s direct-style concurrency”
“now there is the whole Eio/Lwt/Async thing”
“Check out Eio.”