private long benchmark(Runnable r) {
        r.run(); // Warmup
        long start = System.currentTimeMillis();
        r.run();
        long end = System.currentTimeMillis();
        return end - start;
    }
@author <a href="mailto:borud@yahoo-inc.com">Bjorn Borud</a>
@author <a href="mailto:steinar@yahoo-inc.com">Steinar Knutsen</a>
vespajlib/src/test/java/com/yahoo/text/Utf8TestCase.java