feat: minibench -> add

bench/Data/Array.purs

@@ -0,0 +1,28 @@
+module Bench.Data.Array where
+
+import Prelude
+
+import Data.Array as Array
+import Data.Maybe (Maybe(..))
+import Effect (Effect)
+import Effect.Console (log)
+import Performance.Minibench (benchWith)
+
+benchArray :: Effect Unit
+benchArray = do
+  log "mapMaybe"
+  log "---------------"
+  benchMapMaybe
+
+  where
+
+  benchMapMaybe = do
+    let shortNats = Array.range 0 100
+        longNats = Array.range 0 10000
+        onlyEven x = if x `mod` 2 == 0 then Just x else Nothing
+
+    log $ "mapMaybe (" <> show (Array.length shortNats) <> ")"
+    benchWith 1000 \_ -> Array.mapMaybe onlyEven shortNats
+
+    log $ "mapMaybe (" <> show (Array.length longNats) <> ")"
+    benchWith 100 \_ -> Array.mapMaybe onlyEven longNats

bench/Main.purs

@@ -0,0 +1,13 @@
+module Bench.Main where
+
+import Prelude
+
+import Bench.Data.Array (benchArray)
+import Effect (Effect)
+import Effect.Console (log)
+
+main :: Effect Unit
+main = do
+  log "Array"
+  log "==="
+  benchArray

bower.json

@@ -29,6 +29,7 @@
     "purescript-unsafe-coerce": "master"
   },
   "devDependencies": {
+    "purescript-minibench": "master",
     "purescript-assert": "master",
     "purescript-console": "master",
     "purescript-const": "master"

package.json

@@ -3,7 +3,10 @@
   "scripts": {
     "clean": "rimraf output && rimraf .pulp-cache",
     "build": "eslint src && pulp build -- --censor-lib --strict",
-    "test": "pulp test"
+    "test": "pulp test",
+    "bench:build": "pulp build --include bench -- --censor-lib --strict",
+    "bench:run": "node --expose-gc -e \"require('./output/Bench.Main/index.js').main()\"",
+    "bench": "npm run bench:build && npm run bench:run"
   },
   "devDependencies": {
     "eslint": "^4.19.1",