首先建立50萬個文件：
test??for?i?in?$(seq?1?500000) for>?do for>?echo?test?>>$i.txt for>?done
1.rm
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
由于文件數量過多，rm不起作用。
2.find
?test??time?find?./?-type?f?-exec?rm?{}?; find?./?-type?f?-exec?rm?{}?;??49.86s?user?1032.13s?system?41%?cpu?43:19.17?total
大概43分鐘。
3.find with delete
?test??time?find?./?-type?f?-delete??????? find?./?-type?f?-delete??0.43s?user?11.21s?system?2%?cpu?9:13.38?total
用時9分鐘。
4.rsync
首先建立空文件夾blanktest
?~??time?rsync?-a?--delete?blanktest/?test/ rsync?-a?--delete?blanktest/?test/??0.59s?user?7.86s?system?51%?cpu?16.418?total
16s，很好很強大。
5.Python
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
?~??python?test.py 494.272291183
大概用時8分鐘。
6.Perl
?test??time?perl?-e?'for(){((stat)[9]){((stat)[9]
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