Create 500,000 files first
Copy Code code as follows:
Test for I in $ (seq 1 500000)
For> do
for> echo Test >> $i. txt
For> Done
1 RM
Copy Code code as follows:
Test Time Rm-f *
Zsh:sure you want to delete all the files in/home/hungerr/test [yn]? Y
Zsh:argument list Too long:rm
Rm-f * 3.63s User 0.29s system 98% CPU 3.985 Total
RM does not work due to excessive number of files.
2 Find
Copy Code code as follows:
Test time find./-type f-exec rm {} \;
Find./-type f-exec rm {} \; 49.86s user 1032.13s system 41% CPU 43:19.17 Total
About 43 minutes.
3 Find with Delete
Copy Code code as follows:
Test time find./-type F-delete
Find./-type f-delete 0.43s User 11.21s system 2% CPU 9:13.38 Total
Spents 9 minutes.
4 rsync
Create an empty folder first Blanktest
Copy Code code as follows:
~ Time Rsync-a--delete blanktest/test/
Rsync-a--delete blanktest/test/0.59s User 7.86s system 51% CPU 16.418 Total
16s, very good very strong.
5 Python
Copy Code code as follows:
Import OS
Import time
Stime=time.time ()
For pathname,dirnames,filenames in Os.walk ('/home/username/test '):
For filename in filenames:
File=os.path.join (Pathname,filename)
Os.remove (file)
Ftime=time.time ()
Print Ftime-stime
Copy Code code as follows:
~ Python test.py
494.272291183
About 8 minutes.
6 Perl
Copy Code code as follows:
Test time Perl-e ' for (<*>) {(stat) [9]< (unlink)}} '
Perl-e ' for (<*>) {(stat) [9]< (unlink)} ' 1.28s user 7.23s system 50% CPU 16.784 Total
