多进程和单进程区别

[root@node01 0413]# time perl a2.pl

real	2m57.885s
user	0m0.497s
sys	0m0.093s
[root@node01 0413]# ls -ltr
total 1456
-rw-r--r-- 1 root root   1927 Feb 26 07:18 a1.pl
-rw-r--r-- 1 root root   1695 Feb 26 07:20 a2.pl
-rw-r--r-- 1 root root 102655 Feb 26 07:23 1.txt
-rw-r--r-- 1 root root 100631 Feb 26 07:23 2.txt
-rw-r--r-- 1 root root 101847 Feb 26 07:24 3.txt
-rw-r--r-- 1 root root 100288 Feb 26 07:24 5.txt
-rw-r--r-- 1 root root 101228 Feb 26 07:24 6.txt
-rw-r--r-- 1 root root 101605 Feb 26 07:24 7.txt
-rw-r--r-- 1 root root 101919 Feb 26 07:25 8.txt
-rw-r--r-- 1 root root 101897 Feb 26 07:25 9.txt
-rw-r--r-- 1 root root 101749 Feb 26 07:25 10.txt
-rw-r--r-- 1 root root 102083 Feb 26 07:25 11.txt
-rw-r--r-- 1 root root 102381 Feb 26 07:25 12.txt
-rw-r--r-- 1 root root  89726 Feb 26 07:26 13.txt
-rw-r--r-- 1 root root 119149 Feb 26 07:26 14.txt
-rw-r--r-- 1 root root 137142 Feb 26 07:26 15.txt

[root@node01 0413]# sum *.txt
54507   100 10.txt
38754   100 11.txt
62332   100 12.txt
42359    88 13.txt
12490   117 14.txt
10142   134 15.txt
44426   101 1.txt
09497    99 2.txt
46261   100 3.txt
41958    98 5.txt
51718    99 6.txt
46311   100 7.txt
41012   100 8.txt
46713   100 9.txt



[root@node01 0413]# time perl a1.pl
$c====Parallel::ForkManager
$linkarray=== http://blog.csdn.net/zhaoyangjian724/article/category/2757485/1 1.txt
$linkarray=== http://blog.csdn.net/zhaoyangjian724/article/category/2757485/2 2.txt
$linkarray=== http://blog.csdn.net/zhaoyangjian724/article/category/1756685/3 7.txt
$linkarray=== http://blog.csdn.net/zhaoyangjian724/article/category/1756685/1 5.txt
$linkarray=== http://blog.csdn.net/zhaoyangjian724/article/category/1756685/2 6.txt
$linkarray=== http://blog.csdn.net/zhaoyangjian724/article/category/1756685/5 9.txt
$linkarray=== http://blog.csdn.net/zhaoyangjian724/article/category/1756685/9 13.txt
$linkarray=== http://blog.csdn.net/zhaoyangjian724/article/category/1756685/6 10.txt
$linkarray=== http://blog.csdn.net/zhaoyangjian724/article/category/1756685/8 12.txt
$linkarray=== http://bbs.chinaunix.net/forum.php?mod=viewthread&tid=4252654&pid=24595811&page=1 15.txt
$linkarray=== https://blog.csdn.net/zhaoyangjian724/article/details/77947115 14.txt
$linkarray=== http://blog.csdn.net/zhaoyangjian724/article/category/1756685/4 8.txt
$linkarray=== http://blog.csdn.net/zhaoyangjian724/article/category/1756685/7 11.txt
$linkarray=== http://blog.csdn.net/zhaoyangjian724/article/category/2757485/3 3.txt

real	0m21.153s
user	0m2.865s
sys	0m0.497s
[root@node01 0413]# sum *.txt
58496   100 10.txt
14553   100 11.txt
64454   100 12.txt
38268    88 13.txt
17959   117 14.txt
17083   134 15.txt
54946   101 1.txt
24405    99 2.txt
32552   100 3.txt
40290    98 5.txt
30174    99 6.txt
10822   100 7.txt
06389   100 8.txt
45862   100 9.txt