对程序进行优化，通常是指优化程序代码或程序执行速度。优化代码和优化速度实际上是一个予盾的统一，一般是优化了代码的尺寸，就会带来执行时间的增加，如果优化了程序的执行速度，通常会带来代码增加的副作用，很难鱼与熊掌兼得，只能在设计时掌握一个平衡点。-Optimization of the procedure, usually refers to optimize the program code or program execution. Optimize the code and optimize the speed is actually a shield to the unity, the general is to optimize the code size, it will bring an increase in execution time, if the implementation of the procedures to optimize the speed, usually the side effects brought about by the increase in code, it is difficult to both fish and bear' s paw, only to master the design of a point of balance.