Based on published guide Relocatable OCaml by @dra27 I have tried to have faster switches bootstraps, however it does not work in my case:
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$ time opam switch create --repos=relocatable=git+https://github.com/dra27/opam-repository.git#relocatable,default original-compiler ocaml.5.4.0 Creating repository relocatable… [relocatable] Initialised <><> Installing new switch packages <><><><><><><><><><><><><><><><><><><><><><> Switch invariant: [“ocaml” {= “5.4.0”}] <><> Processing actions <><><><><><><><><><><><><><><><><><><><><><><><><><><><> ∗ installed base-bigarray.base ∗ installed base-threads.base ∗ installed base-unix.base ∗ installed ocaml-options-vanilla.1 ⬇ retrieved ocaml.5.4.0 (https://raw.githubusercontent.com/dra27/ocaml/977f2d05a98a5aeec260b5ba200f72c4e79e4fdc/tools/opam/gen_ocaml_config.ml) ⬇ retrieved ocaml-compiler.5.4.0 (cached) ∗ installed ocaml-compiler.5.4.0 ∗ installed ocaml-base-compiler.5.4.0 ∗ installed ocaml.5.4.0 ∗ installed base-domains.base ∗ installed base-effects.base ∗ installed base-nnp.base Done. To update the current shell environment, run: eval $(opam env --switch=original-compiler) real 1m17,531s user 5m19,929s sys 0m35,741s -
$ eval $(opam env)
$ ocamlopt -where
/home/user/.opam/original-compiler/lib/ocaml -
$ time opam switch create . --repos=relocatable,default ocaml.5.4.0 <><> Installing new switch packages <><><><><><><><><><><><><><><><><><><><><><> Switch invariant: [“ocaml” {= “5.4.0”}] <><> Processing actions <><><><><><><><><><><><><><><><><><><><><><><><><><><><> ⬇ retrieved ocaml.5.4.0 (cached) ∗ installed base-bigarray.base ∗ installed base-threads.base ∗ installed base-unix.base ∗ installed ocaml-options-vanilla.1 ⬇ retrieved ocaml-compiler.5.4.0 (cached) ∗ installed ocaml-compiler.5.4.0 ∗ installed ocaml-base-compiler.5.4.0 ∗ installed ocaml.5.4.0 ∗ installed base-domains.base ∗ installed base-effects.base ∗ installed base-nnp.base Done. To update the current shell environment, run: eval $(opam env) real 1m17,862s user 5m23,877s sys 0m35,578s
See, there is no speed-up. Derived switch took about the same time of 1 min and 18 secs.
What am I missing? I’ve tried to follow instructions from original post but to no avail.
Tested on Linux x86_64, shell is BASH and opam is of version 2.5.0
