trigger-gc.scala

object Main {

  private var things: Array[Object] = null

  def allocate(size: Int): Unit = {
    things = new Array[Object](size)
    Array.fill(size)(new Object)
  }

  def main(args: Array[String]): Unit = {
    val size: Int = args match {
      case Array(n, _*) => Integer.parseInt(n)
      case _ => 100000000
    }

    while (true) {
      println()
      println(s"Allocating $size elements")
      allocate(size)

      println("Press enter to run GC")
      io.StdIn.readLine()
    }

  }
}