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CCS5.5编译器问题



刚刚升级到最新的CCS5.5 和c2800 compiler version 6.2.5 发现编译时新增了不少优化选项

双击之后,有如下对话框

以前没用过,这是不是编译器建议的优化选项,可以选择在代码执行速度和代码容量上进行优化,是不是优化执行速度就是以牺牲代码容量为代价的呢?这几个选项一般怎么选呢,优化以后不会对逻辑有影响吧?谢谢