kimmking edited a comment on issue #2578: The current RoundRobinLoadBalance implementation performance is not satisfactory URL: https://github.com/apache/incubator-dubbo/issues/2578#issuecomment-425622651 In your case 1: Invoking currentSelect-method 1M times lead to 1833832000 times calc, cause: ``` for (int i = 0; i < maxWeight; i++) { // this is the reason for (Map.Entry<Integer, IntegerWrapper> each : invokerToWeightMap.entrySet()) { .... } } ``` If we modify the weight array to {100, 100, 200, 200, 300, 300, 400, 400, 500, 5000}; It need 60+s to finish it. So we must optimize this RR algorithm.
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