early Json benchmark for Parboiled2

Jsonbench.scala

/**
 * Following libs are required to compile and run the benchmark:
 * - jackson-core-asl-1.0.0.jar
 * - jackson-mapper-asl-1.0.0.jar
 * - lift-json-???.jar
 */
package org.parboiled2.examples.v2
object Jsonbench {
  import scala.util.parsing.json._
  import org.codehaus.jackson._
  import org.codehaus.jackson.map._
  import net.liftweb.json.JsonParser
  import spray.json._
  import DefaultJsonProtocol._

  def main(args: Array[String]) = {

    val mapper = new ObjectMapper
    benchmark("Jackson") { mapper.readValue(oneLineJson, classOf[JsonNode]) }
    benchmark("Lift Json") { JsonParser.parse(oneLineJson) }
    benchmark("Parboiled2") {
      val jsonSimpleParser = new JsonSimpleParser(oneLineJson)
      jsonSimpleParser.run(_.InputLine)
    }
    benchmark("Parboiled") { JSON.parseRaw(oneLineJson) }
    benchmark("Scala std") { JSON.parseRaw(json) }
  }

  def benchmark(name: String)(f: => Any) = {
    println("warmup")
    (1 to 50000).foreach(i => f)
    println("warmup done")
    val t = time {
      (1 to 50000).foreach(i => f)
    }
    println(name + "\t" + t + "ms")
  }

  def time(f: => Any): Long = {
    val start = System.currentTimeMillis
    f
    System.currentTimeMillis - start
  }

  val oneLineJson = """{"glossary":{"title":"exampleglossary","GlossDiv":{"title":"S","GlossList":{"GlossEntry":{"ID":"SGML","SortAs":"SGML","GlossTerm":"StandardGeneralizedMarkupLanguage","Acronym":"SGML","Abbrev":"ISO8879","GlossDef":{"para":"Ametamarkuplanguage","GlossSeeAlso":["GML","XML"]},"GlossSee":"markup"}}}}}"""

  val json = """
{
  "glossary": {
    "title": "example glossary",
    "GlossDiv": {
      "title": "S",
      "GlossList": {
        "GlossEntry": {
          "ID": "SGML",
    "SortAs": "SGML",
	  "GlossTerm": "Standard Generalized Markup Language",
	  "Acronym": "SGML",
	  "Abbrev": "ISO 8879:1986",
	  "GlossDef": {
            "para": "A meta-markup language, used to create markup languages such as DocBook.",
	    "GlossSeeAlso": ["GML", "XML"]
          },
	  "GlossSee": "markup"
        }
      }
    }
  }
}
"""
}