Use jmh-sbt over scaliper for benchmarks

.gitignore

@@ -5,4 +5,5 @@ scala/project/project/
 scala/project/target/
 scala/target/
 scala/.ensime_cache/*
+scala/bench/target/*
 haskell/.stack-work/*

scala/bench/src/main/scala/svc/Bench.scala

@@ -0,0 +1,54 @@
+package svc
+
+import java.util.concurrent.TimeUnit
+import org.openjdk.jmh.annotations._
+
+// --- //
+
+@BenchmarkMode(Array(Mode.AverageTime))
+@OutputTimeUnit(TimeUnit.NANOSECONDS)
+class Bench {
+  /* A single call to `get`, which fetches the current "stateful" value */
+  @Benchmark
+  def oneGetCats: (Int, Int) = Kitties.oneGet
+
+  @Benchmark
+  def oneGetScalaz: (Int, Int) = Zed.oneGet
+
+  /* Binding speed */
+  @Benchmark
+  def bindCats: (Int, Unit) = Kitties.bind.run(1).value
+
+  @Benchmark
+  def flatMapCats: (Int, Unit) = Kitties.flatmap.run(1).value
+
+  @Benchmark
+  def bindScalaz: (Int, Unit) = Zed.bind.run(1)
+
+  @Benchmark
+  def flatMapScalaz: (Int, Unit) = Zed.flatmap.run(1)
+
+  /* Count down by assigning each `n` to the State */
+  @Benchmark
+  def countdownCats: (Int, Int) = Kitties.countdown.run(10000).value
+
+  @Benchmark
+  def countdownScalaz: (Int, Int) = Zed.trampolineCountdown.run(10000).run
+
+  @Benchmark
+  def countdownCatsStateTEitherT: Either[String, (Int, Unit)] =
+    Kitties.countdownT.run(10000).value.value
+
+  /* Silly summing using Applicative functors */
+  @Benchmark
+  def cartesianSumCats: Option[Int] = Kitties.dumbSum(List.range(0, 1000))
+
+  @Benchmark
+  def applicativeSumCats: Option[Int] = Kitties.dumbSum2(List.range(0, 1000))
+
+  @Benchmark
+  def cartesianSumScalaz: Option[Int] = Zed.dumbSum(List.range(0, 1000))
+
+  @Benchmark
+  def applicativeSumScalaz: Option[Int] = Zed.dumbSum2(List.range(0, 1000))
+}

scala/build.sbt

@@ -2,15 +2,26 @@ name := """scalaz-vs-cats"""
 
 version := "1.0"
 
-scalaVersion := "2.12.3"
+/* Settings common to each sub project */
+val common = Seq(
+  scalaVersion := "2.11.11",
 
-scalacOptions ++= Seq(
-  "-language:higherKinds",
-  "-Ypartial-unification"
-)
+  scalacOptions ++= Seq(
+    "-language:higherKinds",
+    "-Ypartial-unification"
+  ),
 
-libraryDependencies ++= Seq(
-  "org.typelevel" %% "cats-core"   % "1.0.0-MF",
-  "org.scalaz"    %% "scalaz-core" % "7.3.0-M15",
-  "com.azavea"    %% "scaliper"    % "0.5.0-SNAPSHOT" % "test"
+  libraryDependencies ++= Seq(
+    "org.typelevel" %% "cats-core"   % "1.0.0-MF",
+    "org.scalaz"    %% "scalaz-core" % "7.3.0-M15"
+  )
 )
+
+/* The library itself */
+lazy val lib = project.in(file(".")).settings(common)
+
+/* Benchmarking suite.
+ * Benchmarks can be executed by first switching to the `bench` project and then by running:
+ *     jmh:run -t 1 -f 1 -wi 10 -i 10 .*Bench.*
+ */
+lazy val bench = project.in(file("bench")).settings(common).dependsOn(lib).enablePlugins(JmhPlugin)

scala/project/plugins.sbt

@@ -0,0 +1 @@
+addSbtPlugin("pl.project13.scala" % "sbt-jmh" % "0.2.27")