Scala Microbenchmark Runner

microbenchmark-runner.scala

def benchmark(runs: Long, reps: Long, funct: => Any) = {     
    // warmup    
    println("Warming Up") 
    var i = 0
    while ( i < 25000 ) { funct; i = i + 1 }
    // test runs
    println("Running Test")
    var j = 0
    while ( j < runs ) {    
        var k = 0
        val start = System.nanoTime()
        while ( k < reps ) { funct; k = k + 1 }
        val avgNanos = (System.nanoTime() - start) / reps
        val avgMillis = avgNanos / 1000000f
        println("Avg Execution Time: %s ms".format(avgMillis))
        j = j + 1
    }
}