private final AtomicLong errors = new AtomicLong();
        private final AtomicLong latencyTotal = new AtomicLong();
        
        public double getAverageLatency() {
            long ops = operations.get();
            if (ops == 0) return 0;
            return (double) latencyTotal.get() / ops;
        }
        
        public long getThroughput() {