StringBuilder sb = new StringBuilder();
private RatedMessage joinMessage(int step,boolean isresult) {
        sb.delete(0,sb.length());
        RatedMessage rm;
        for (int i = 0; i <= step; i++) {
            if (mStack[i] == null)
                continue;
            rm = mStack[i].getCurrentMsg();// msg is built upfront,this just returns,it's a getter method call
            if (rm == null || rm.msg.length() == 0)
                continue;
            if (sb.length() != 0) {
                sb.append(",");
            }
            sb.append(rm.msg);
        }
        rm.msg=sb.toString();
        return rm;
    }

重要的是阵列最多可容纳10个项目,所以它并不多.

我的跟踪输出告诉我这个方法被称为18864次,在此方法中花费了16％的运行时间.我可以优化更多吗？