Updating sbt config, adding benchmarks

build.sbt

@@ -1,88 +1,36 @@
-// The simplest possible sbt build file is just one line:
+lazy val Benchmark = config("bench") extend Test
 
-scalaVersion := "2.12.8"
-// That is, to create a valid sbt build, all you've got to do is define the
-// version of Scala you'd like your project to use.
-
-// ============================================================================
-
-// Lines like the above defining `scalaVersion` are called "settings" Settings
-// are key/value pairs. In the case of `scalaVersion`, the key is "scalaVersion"
-// and the value is "2.12.8"
-
-// It's possible to define many kinds of settings, such as:
-
-name := "hello-world"
-organization := "ch.epfl.scala"
 version := "1.0"
 
-// Note, it's not required for you to define these three settings. These are
-// mostly only necessary if you intend to publish your library's binaries on a
-// place like Sonatype or Bintray.
+lazy val basic = Project(
+  "basic-with-separate-config",
+  file("."),
+  settings = Defaults.coreDefaultSettings ++ Seq(
+    name := "enso-lexer",
+    organization := "org.enso",
+    scalaVersion := "2.12.8",
+    scalacOptions ++= Seq("-deprecation", "-unchecked", "-feature", "-Xlint"),
+    publishArtifact := false,
+    libraryDependencies ++= Seq(
+      "com.storm-enroute" %% "scalameter" % "0.17" % "bench"
+    ),
+    libraryDependencies += "org.typelevel" %% "cats-core" % "1.6.0",
+    libraryDependencies += "org.scalatest" %% "scalatest" % "3.0.5" % Test,
 
-
-resolvers += "Sonatype OSS Snapshots" at
-  "https://oss.sonatype.org/content/repositories/snapshots"
-
-
-// Want to use a published library in your project?
-// You can define other libraries as dependencies in your build like this:
-libraryDependencies += "org.typelevel" %% "cats-core" % "1.6.0"
-libraryDependencies += "org.scalatest" %% "scalatest" % "3.0.5" % Test
-libraryDependencies += "com.storm-enroute" %% "scalameter" % "0.17"
-
-// Here, `libraryDependencies` is a set of dependencies, and by using `+=`,
-// we're adding the cats dependency to the set of dependencies that sbt will go
-// and fetch when it starts up.
-// Now, in any Scala file, you can import classes, objects, etc, from cats with
-// a regular import.
-
-// TIP: To find the "dependency" that you need to add to the
-// `libraryDependencies` set, which in the above example looks like this:
-
-// "org.typelevel" %% "cats-core" % "1.6.0"
-
-// You can use Scaladex, an index of all known published Scala libraries. There,
-// after you find the library you want, you can just copy/paste the dependency
-// information that you need into your build file. For example, on the
-// typelevel/cats Scaladex page,
-// https://index.scala-lang.org/typelevel/cats, you can copy/paste the sbt
-// dependency from the sbt box on the right-hand side of the screen.
-
-// IMPORTANT NOTE: while build files look _kind of_ like regular Scala, it's
-// important to note that syntax in *.sbt files doesn't always behave like
-// regular Scala. For example, notice in this build file that it's not required
-// to put our settings into an enclosing object or class. Always remember that
-// sbt is a bit different, semantically, than vanilla Scala.
-
-// ============================================================================
-
-// Most moderately interesting Scala projects don't make use of the very simple
-// build file style (called "bare style") used in this build.sbt file. Most
-// intermediate Scala projects make use of so-called "multi-project" builds. A
-// multi-project build makes it possible to have different folders which sbt can
-// be configured differently for. That is, you may wish to have different
-// dependencies or different testing frameworks defined for different parts of
-// your codebase. Multi-project builds make this possible.
-
-// Here's a quick glimpse of what a multi-project build looks like for this
-// build, with only one "subproject" defined, called `root`:
-
-// lazy val root = (project in file(".")).
-//   settings(
-//     inThisBuild(List(
-//       organization := "ch.epfl.scala",
-//       scalaVersion := "2.12.8"
-//     )),
-//     name := "hello-world"
-//   )
-
-// To learn more about multi-project builds, head over to the official sbt
-// documentation at http://www.scala-sbt.org/documentation.html
+    resolvers ++= Seq(
+      "Sonatype OSS Snapshots" at "https://oss.sonatype.org/content/repositories/snapshots",
+      "Sonatype OSS Releases"  at "https://oss.sonatype.org/content/repositories/releases"
+    ),
+    testFrameworks += new TestFramework("org.scalameter.ScalaMeterFramework"),
+    parallelExecution in Benchmark := false,
+    logBuffered := false
+  )
+) configs(
+  Benchmark
+) settings(
+  inConfig(Benchmark)(Defaults.testSettings): _*
+)
 
 SbtJFlexPlugin.jflexSettings
 
 mainClass in (Compile, run) := Some("org.enso.syntax.text.lexer.Main")
-testFrameworks += new TestFramework("org.scalameter.ScalaMeterFramework")  
-logBuffered := false
-parallelExecution in Test := false

src/bench/scala/org/enso/syntax/text/Lexer.scala

@@ -0,0 +1,19 @@
+package org.enso.syntax.text.lexer
+
+import org.scalameter.api._
+
+object RangeBenchmark extends Bench.LocalTime {
+  val sizes = Gen.range("size")(300000, 1500000, 300000)
+
+  val ranges = for {
+    size <- sizes
+  } yield 0 until size
+
+  performance of "Range" in {
+    measure method "map" in {
+      using(ranges) in {
+        r => r.map(_ + 1)
+      }
+    }
+  }
+}