总结:
- KMP匹配无规律的匹配字符串效果不太好。
- KMP匹配有关联的字符串效率比较高。
- KMP匹配无关数据,效率也许比简单匹配低。
无关数据匹配
//无关数据匹配
//模式匹配字符串P
A B C D A B D A B A C D
-1 0 0 0 -1 0 2 -1 0 2 1 0 //文本串S
E H Z U Z E C A K G ... I U N V M S N S Z E
------------------ 1024K -------------------- 1048568
0.0100 seconds.
0.0100 seconds.
------------------end-------------------- ------------------ 10240K -------------------- 10485752
0.0200 seconds.
0.0600 seconds.
------------------end-------------------- ------------------ 102400K -------------------- 104857592
0.2500 seconds.
0.5900 seconds.
------------------end-------------------- ------------------ 1024000K -------------------- 1048575992
//简单算法法
10.1300 seconds.
//KMP算法(时间不包含生成next[])
17.9200 seconds.
------------------end--------------------
有关数据匹配
//有关数据匹配
//模式匹配字符串P
A B C D A B D A B A C D
-1 0 0 0 -1 0 2 -1 0 2 1 0
//文本串S
C B B D A C C B B A ... C B C A C D C A B C
------------------ 1M --------------------
1048564
0.0200 seconds.
0.0100 seconds.
------------------end--------------------
------------------ 10M --------------------
3440052
0.0200 seconds.
0.0300 seconds.
------------------end--------------------
------------------ 100M --------------------
3440052
0.0200 seconds.
0.0300 seconds.
------------------end--------------------
D A C B A A C A D C ... A C A C C C B C B B
------------------ 1000M --------------------
46132800
//简单算法法
0.5300 seconds.
//KMP算法(时间不包含生成next[])
0.4400 seconds.
------------------end--------------------