explode，split，preg_split性能比较

分类： php2012-07-12 09:46 1109人阅读 评论(1)  举报

三个函数都是用来对字符串进行分割，下面分几个实验来比较之间的性能。

1. explode与split比较

都用字符进行分割，执行10次

代码：

[php] view plaincopy

1. for($num=0;$num<9;$num++)
2. {
3. $stime=microtime();
4. for($i=0;$i<10000;$i++)
5. {
6. explode(',','hello,world');
7. }
8. $etime=microtime();
9. printf("explode takes %f \n",$etime-$stime);
10. }
11. for($num=0;$num<9;$num++)
12. {
13. $stime=microtime();
14. for($i=0;$i<10000;$i++)
15. {
16. split(',','hello,world');
17. }
18. $etime=microtime();
19. printf("split takes %f \n",$etime-$stime);
20. }

结果：

explode takes 0.009193 
explode takes 0.007066 
explode takes 0.007623 
explode takes 0.005829 
explode takes 0.005497 
explode takes 0.005734 
explode takes 0.005502 
explode takes 0.005515 
explode takes 0.005524 
split takes 0.008976 
split takes 0.008971 
split takes 0.009030 
split takes 0.009173 
split takes 0.009913 
split takes 0.012656 
split takes 0.012153 
split takes 0.009161 
split takes 0.008948

结论：都用字符进行分割的情况下，explode性能优于split

split用正则进行分割：

代码：

[php] view plaincopy

1. for($num=0;$num<9;$num++)
2. {
3. $stime=microtime();
4. for($i=0;$i<10000;$i++)
5. {
6. explode(',','hello,world');
7. }
8. $etime=microtime();
9. printf("explode takes %f \n",$etime-$stime);
10. }
11. for($num=0;$num<9;$num++)
12. {
13. $stime=microtime();
14. for($i=0;$i<10000;$i++)
15. {
16. split('/,/','hello,world');
17. }
18. $etime=microtime();
19. printf("split takes %f \n",$etime-$stime);
20. }

结果：

explode takes 0.005649
explode takes 0.005719
explode takes 0.005792
explode takes 0.005975
explode takes 0.005723
explode takes 0.005812
explode takes 0.005860
explode takes 0.005756
explode takes 0.005835
split takes 0.005158 
split takes 0.005170 
split takes 0.005440 
split takes 0.005402 
split takes 0.005272 
split takes 0.005434 
split takes 0.006389 
split takes 0.005414 
split takes 0.005510

结论：在split使用正则分割的情况下，两者性能不相上下

2. split与preg_split比较

代码：

[php] view plaincopy

1. for($num=0;$num<9;$num++)
2. {
3. $stime=microtime();
4. for($i=0;$i<10000;$i++)
5. {
6. split('/,/','hello,world');
7. }
8. $etime=microtime();
9. printf("split takes %f \n",$etime-$stime);
10. }
11. for($num=0;$num<9;$num++)
12. {
13. $stime=microtime();
14. for($i=0;$i<10000;$i++)
15. {
16. preg_split("/,/","hello,world");
17. }
18. $etime=microtime();
19. printf("preg_split takes %f \n",$etime-$stime);
20. }

结果：

split takes 0.005381 
split takes 0.005568 
split takes 0.005107 
split takes 0.005097 
split takes 0.005444 
split takes 0.005538 
split takes 0.005095 
split takes 0.005112 
split takes 0.005087 
preg_split takes 0.009364 
preg_split takes 0.009568 
preg_split takes 0.009037 
preg_split takes 0.008957 
preg_split takes 0.009021 
preg_split takes 0.009656 
preg_split takes 0.009038 
preg_split takes 0.008962 
preg_split takes 0.009412

结论：split性能优于preg_split

来源： <http://blog.csdn.net/tonyxf121/article/details/7738919>

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