摘要
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矛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。
Carries on the optimization to the procedure, usually is refers to the optimized procedure code or the procedure carries out the speed. The optimized code and the optimized speed are in fact gives the shield the unification, generally optimized the code size, could bring the execution time the increase, if optimized the procedure to carry out the speed, usually could bring the side effect which the code increased, the very difficult fish and the bear＇s paws concurrently,only could when the design grasped a balance point.
关键词
标识符
表达式
函数
全局变量
局部变量
Identifier
Expression
Function
Overall situation variable
Partialvariable
