Thyme benchmark of tap and pipe vs manual inlining

Bench.scala

package bench

import scala.language.implicitConversions

import ichi.bench._

object Implicits {
  final class ChainingOps[A](private val self: A) extends AnyVal {
    @inline def tap[U](f: A => U): A = { f(self); self }
    @inline def pipe[B](f: A => B): B = f(self)
  }
  
  implicit def implicitChains[A](a: A) = new ChainingOps(a)
}


class Bench {
  import Implicits._
  
  def run() {
    val th = Thyme.warmed(0.03)

    val a = Array.fill(1000)(Array.fill(10)(scala.util.Random.nextInt(3)))

    def zlen(xs: Array[Int]): Int = {
      var i = 0
      while (i < xs.length) {
        if (xs(i) == 0) return i
        i += 1
      }
      i
    }

    def zlenTap(xs: Array[Int]): Int = {
      var i = 0
      while (i < xs.length) {
        xs(i).tap(x => if (x == 0) return i)
        i += 1
      }
      i
    }

    def zsum(xs: Array[Int]) = {
      var s, i = 0
      while (i < xs.length) {
        val x = xs(i)
        s += x*x + x + 2
        i += 1
      }
      i
    }

    def zsumPipe(xs: Array[Int]) = {
      var s, i = 0
      while (i < xs.length) {
        s += xs(i).pipe(x => x*x + x + 2)
        i += 1
      }
      i
    }


    th.pbenchOff("len tap"){ var i, s = 0; while (i < a.length) { s += zlen(a(i)); i += 1 }; s }{ var i, s = 0; while (i < a.length) { s += zlenTap(a(i)); i += 1 }; s }
    println
    th.pbenchOff("sum pipe"){ var i, s = 0; while (i < a.length) { s += zsum(a(i)); i += 1 }; s }{ var i, s = 0; while (i < a.length) { s += zsumPipe(a(i)); i += 1 }; s }
    println
    println
  }
}

object Bench {
  def main(args: Array[String]) {
    val b = new Bench()
    for (i <- 1 to 5) b.run()
  }
}

build.sbt

resolvers += "Sonatype OSS Snapshots" at "https://oss.sonatype.org/content/repositories/snapshots"

lazy val root = (project in file(".")).
  settings(
    name := "testing",
    version := "0.0.0",
    scalaVersion := "2.12.4",
    scalacOptions ++= Seq(
      "-unchecked", "-feature", "-deprecation", "-opt:l:method", "-opt:l:inline"
    ),
    libraryDependencies += "com.github.ichoran" %% "thyme" % "0.1.2-SNAPSHOT"
  )