private long max(long[] values) {
        long max = Long.MIN_VALUE;

        for (long v : values) {
            max = Math.max(max, v);
        }
        return max;
    }
Object identity is used to differentiate between different implementation strategies, toString() is used to print a report.

@return an object with a descriptive toString() for the implementation under test
vespajlib/src/test/java/com/yahoo/text/JsonMicroBenchmarkTestCase.java