Ludovic Courtès <ludo@gnu.org> skribis:

> $ time GUIX_PROFILING="rpc reference-cache derivation-graft-cache" ./pre-inst-env  guix system vm gnu/system/examples/desktop.tmpl 
> 0.2 MB will be downloaded
>  polkit-0.121  198KiB                                                                                1.4MiB/s 00:00 [##################] 100.0%
> /gnu/store/sk1571rnh5jl2ilp0v1k8bqwsdrngwxy-run-vm.sh
> Reference Cache:
>   fresh caches:     8
>   lookups:      77581
>   hits:         52890 (68.2%)
>   cache size:     838 entries
> Derivation graft cache:
>   fresh caches:    39
>   lookups:      704635
>   hits:         627819 (89.1%)
>   cache size:    2946 entries
> Remote procedure call summary: 33071 RPCs
>   built-in-builders              ...     1
>   query-substitutable-path-infos ...     2
>   build-things                   ...     2
>   add-to-store/tree              ...    56
>   valid-path?                    ...    59
>   add-to-store                   ...   373
>   add-text-to-store              ...  7887
>   query-references               ... 24691
>
> real	5m6.727s
> user	6m59.438s
> sys	0m1.633s

With this patch: