diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 1daf0513..07b53c6e 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -24,8 +24,9 @@ jobs:
         opam pin add -n conduit-async-ssl.dev .
         opam pin add -n conduit-lwt-tls.dev .
         opam pin add -n conduit-lwt-ssl.dev .
+        opam pin add -n conduit-bench.dev .
         opam depext  -y conduit conduit-tls conduit-lwt conduit-async conduit-mirage
-        opam install --deps-only -t conduit conduit-tls conduit-lwt conduit-lwt-tls conduit-lwt-ssl conduit-async conduit-async-tls conduit-async-ssl conduit-mirage
+        opam install --deps-only -t conduit conduit-tls conduit-lwt conduit-lwt-tls conduit-lwt-ssl conduit-async conduit-async-tls conduit-async-ssl conduit-mirage conduit-bench
     - name: Build
       run: opam exec -- dune build
     - name: Test
diff --git a/Makefile b/Makefile
index 2d83066e..673509cd 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,4 @@
-.PHONY: build clean test doc
+.PHONY: build clean test doc bench
 
 build:
 	dune build
@@ -11,3 +11,6 @@ clean:
 
 doc:
 	dune build @doc
+
+bench:
+	@dune exec  -- ./bench/cost.exe --json
\ No newline at end of file
diff --git a/bench/cost.ml b/bench/cost.ml
index be91e6ce..9e15fb25 100644
--- a/bench/cost.ml
+++ b/bench/cost.ml
@@ -99,7 +99,42 @@ let fn_fully_abstr flow = Benchmark.V (fun () -> Tuyau.send flow hello_world)
 let fn_abstr (Tuyau.Flow (flow, (module Flow))) =
   Benchmark.V (fun () -> Flow.send flow hello_world)
 
-let run () =
+type result = {
+  with_conduit : float;
+  with_conduit_r2 : float;
+  without_conduit : float;
+  without_conduit_r2 : float;
+}
+[@@deriving to_yojson]
+
+let print_json est0 est1 r0 r1 =
+  let with_conduit = est0.(0) in
+  let with_conduit_r2 = r0 in
+  let without_conduit = est1.(0) in
+  let without_conduit_r2 = r1 in
+  let res =
+    { with_conduit; with_conduit_r2; without_conduit; without_conduit_r2 } in
+  let fmt = stdout |> Format.formatter_of_out_channel in
+  let open Yojson.Safe in
+  let obj =
+    `Assoc
+      [
+        ( "results",
+          `Assoc
+            [
+              ("name", `String "benchmarks"); ("metrics", result_to_yojson res);
+            ] );
+      ] in
+  pretty_print fmt obj
+
+let print_stdout est0 est1 r0 r1 =
+  Fmt.pr "with Conduit:\t\t%fns (r²: %f).\n%!" est0.(0) r0 ;
+  Fmt.pr "without Conduit:\t%fns (r²: %f).\n%!" est1.(0) r1 ;
+  if r0 >= 0.99 && r1 >= 0.99
+  then Fmt.pr "Overhead:\t\t%fns.\n%!" (est0.(0) -. est1.(0))
+  else Fmt.epr "Bad regression coefficients!\n%!"
+
+let run json =
   let open Rresult in
   Tuyau.connect Unix.stderr fake0 >>= fun flow ->
   Tuyau.send flow hello_world >>= fun _ ->
@@ -111,17 +146,23 @@ let run () =
       Linear_algebra.ols (fun m -> m.(1)) [| (fun m -> m.(0)) |] samples1 )
   with
   | Ok (estimate0, r0), Ok (estimate1, r1) ->
-      Fmt.pr "with Conduit:\t\t%fns (r²: %f).\n%!" estimate0.(0) r0 ;
-      Fmt.pr "without Conduit:\t%fns (r²: %f).\n%!" estimate1.(0) r1 ;
-      if r0 >= 0.99 && r1 >= 0.99
-      then Fmt.pr "Overhead:\t\t%fns.\n%!" (estimate0.(0) -. estimate1.(0))
-      else Fmt.epr "Bad regression coefficients!\n%!" ;
+      (match json with
+      | true -> print_json estimate0 estimate1 r0 r1
+      | false -> print_stdout estimate0 estimate1 r0 r1) ;
       Ok ()
   | Error err, _ -> Error err
   | _, Error err -> Error err
 
-let () =
-  match run () with
+open Cmdliner
+
+let json = Arg.(value & flag & info [ "j"; "json" ])
+
+let main json =
+  match run json with
   | Ok v -> v
   | Error (`Msg err) -> Fmt.epr "%s: %s.\n%!" Sys.argv.(0) err
   | Error `Not_found -> assert false
+
+let cmd = (Term.(const main $ json), Term.info "run benchmarks")
+
+let () = Term.(exit @@ eval cmd)
diff --git a/bench/dune b/bench/dune
index 19246a85..fc7cb22e 100644
--- a/bench/dune
+++ b/bench/dune
@@ -1,6 +1,9 @@
 (executable
- (name cost)
- (libraries conduit unix rresult fmt)
+ (public_name cost)
+ (package conduit-bench)
+ (preprocess
+  (pps ppx_deriving_yojson))
+ (libraries conduit unix rresult fmt cmdliner yojson ppx_deriving_yojson)
  (foreign_stubs
   (language c)
   (names rdtsc)))
diff --git a/conduit-bench.opam b/conduit-bench.opam
new file mode 100644
index 00000000..03db43f3
--- /dev/null
+++ b/conduit-bench.opam
@@ -0,0 +1,33 @@
+opam-version: "2.0"
+maintainer: "anil@recoil.org"
+authors: [
+  "Anil Madhavapeddy"
+  "Thomas Leonard"
+  "Thomas Gazagnaire"
+  "Rudi Grinberg"
+  "Romain Calascibetta"
+]
+license: "ISC"
+tags: "org:mirage"
+homepage: "https://github.com/mirage/ocaml-conduit"
+doc: "https://mirage.github.io/ocaml-conduit/"
+bug-reports: "https://github.com/mirage/ocaml-conduit/issues"
+dev-repo: "git+https://github.com/mirage/ocaml-conduit.git"
+synopsis: "Conduit benchmarking suite"
+
+build: [
+  ["dune" "subst"] {pinned}
+  ["dune" "build" "-p" name "-j" jobs]
+  ["dune" "runtest" "-p" name] {with-test}
+]
+
+depends: [
+  "ocaml"        {>= "4.07.0"}
+  "dune"         {>= "2.0.0"}
+  "cmdliner"
+  "conduit"
+  "fmt"
+  "ppx_deriving_yojson"
+  "rresult"
+  "yojson"
+]