Multicore is coming along, you can read the latest news here: https://discuss.ocaml.org/t/multicore-ocaml-june-2021/8134 https://discuss.ocaml.org/t/multicore-o

Multicore is coming along, you can read the latest news here: https://discuss.ocaml.org/t/multicore-ocaml-june-2021/8134 https://discuss.ocaml.org/t/multicore-ocaml-june-2021/8134 In terms of performance, there is this paper https://kcsrk.info/papers/system_effects_feb_18.pdf https://kcsrk.info/papers/system_effects_feb_18.pdf where on a single core async OCaml and effect OCaml are close to Go's net/http, and there is also this project https://github.com/ocaml-multicore/retro-httpaf-bench https://github.com/ocaml-multicore/retro-httpaf-bench but I haven't see any results from it.