boxed

import CoreFoundation

func timeIt(m: () -> ()) -> (Double, Int) {
    let startTime = CFAbsoluteTimeGetCurrent()
    var numberOfRuns = 0
    while true {
        m()
        numberOfRuns += 1
        let elapsed = CFAbsoluteTimeGetCurrent() - startTime
        if elapsed > 0.5 { // we run the function up to 0.5 seconds, assuming here that we want to sample functions that are pretty fast