Add bench dependencies on core and core_bench.

CHANGES.md

@@ -13,6 +13,11 @@
 - Removed deprecated `json` type aliasing type `t` which has been available
   since 1.6.0 (@Leonidas-from-XIV, #100).
 
+### Add
+
+- Add an opam package `yojson-bench` to deal with benchmarks dependency
+  (@tmcgilchrist, #117)
+
 ## 1.7.0
 
 *2019-02-14*

bench/bench.ml

@@ -10,17 +10,17 @@ let yojson_data = Yojson.Safe.from_string data
 let large = 10_000
 
 let large_int_assoc = 
-  let ints = List.init large (fun n ->
+  let ints = List.init large ~f:(fun n ->
    (string_of_int n, `Int n))
   in
   `Assoc ints
 
 let large_int_list = 
-  let ints = List.init large (fun n -> `Int n) in
+  let ints = List.init large ~f:(fun n -> `Int n) in
   `List ints
 
 let large_string_list =
-  let strings = List.init large (fun n ->
+  let strings = List.init large ~f:(fun n ->
     `String (string_of_int n))
   in
   `List strings

bench/dune

@@ -1,5 +1,7 @@
 (executable
  (name bench)
+ (package yojson-bench)
+ (public_name yojson-bench)
  (flags (-safe-string))
  (libraries yojson core_bench core))
 

test/dune

@@ -1,3 +1,4 @@
 (test
   (name test)
+  (package yojson)
   (libraries yojson alcotest))

yojson-bench.opam

@@ -0,0 +1,24 @@
+opam-version: "2.0"
+maintainer: ["[email protected]" "[email protected]" "[email protected]"]
+authors: ["Martin Jambon"]
+homepage: "https://github.com/ocaml-community/yojson"
+bug-reports: "https://github.com/ocaml-community/yojson/issues"
+dev-repo: "git+https://github.com/ocaml-community/yojson.git"
+doc: "https://ocaml-community.github.io/yojson/"
+license: "BSD-3-Clause"
+depends: [
+  "ocaml" {>= "4.04"}
+  "yojson" {= version}
+  "dune"
+  "core_bench" {>= "v0.11.0"}
+  "core" {>= "v0.11.0"}
+]
+build: [
+  ["dune" "subst"] {pinned}
+  ["dune" "build" "-p" name "-j" jobs]
+]
+synopsis: "Run Yojson benchmarks"
+description: """\
+Yojson benchmarks require `Core_bench` which is not a dependency of Yojson,
+because it is not part of the regular installation/testing flow. This is solely
+meant for developers that are worried about performance changes in Yojson."""