The compiler optimization made the program run faster.
编译器优化让程序运行得更快了。
After enabling compiler optimization, the binary became smaller and faster, but debugging was harder because the generated code no longer matched the source line by line.
开启编译器优化后,可执行文件更小、速度更快,但调试更困难,因为生成的代码不再与源代码逐行对应。