Increase the performance of find command. Post: 303041945

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Top Forums Shell Programming and Scripting Increase the performance of find command. Post 303041945 by drl on Saturday 7th of December 2019 02:09:29 PM

12-07-2019

Registered User

Hi.

Quote:

Originally Posted by jim mcnamara

What I'm saying is: performance enhancement work is subjective and often a misplaced resource and a waste of programmer time.
Suppose your command runs in one minute in production. Then you work hard and get it down to 35 seconds. The user perception of "slow" will still be there, so you have to get it down to maybe 6 seconds to make users happy and see it as "faster". In this case getting an order of magnitude improvement may not be possible.

Indeed. The first question one needs to answer is Does it have to be faster? Otherwise you are spending time that probably could be better spent elsewhere.

That being said, I have been [trying to] learn rustc, and have compiled a few codes that are very fast. One is fd. You can see benchmarks comparing it to standard find at GitHub - sharkdp/fd: A simple, fast and user-friendly alternative to 'find'

Depending on choices fd is faster by a factor of 5 up to 9, or even faster if one ignores hidden directories.

However, it would require you to either download a compiled code, or download the Rust system and compile fd yourself. I don't see a version for AIX, so this is academic.

I suppose if enough folks asked for Rust to be ported to platforms like Solaris, AIX, etc., it might happen. It might be worth a try if one really, really wanted that extra bit of speed.

I'll take the speed if it's easy to do and I really need it, but otherwise I have other stuff to do.

Best wishes ... cheers, drl

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LEARN ABOUT FREEBSD

shar

SHAR(1) 						    BSD General Commands Manual 						   SHAR(1)

NAME

     shar -- create a shell archive of files

SYNOPSIS

     shar file ...

DESCRIPTION

     The shar command writes a sh(1) shell script to the standard output which will recreate the file hierarchy specified by the command line op-
     erands.  Directories will be recreated and must be specified before the files they contain (the find(1) utility does this correctly).

     The shar command is normally used for distributing files by ftp(1) or mail(1).

EXAMPLES

     To create a shell archive of the program ls(1) and mail it to Rick:

	   cd ls
	   shar `find . -print` | mail -s "ls source" rick

     To recreate the program directory:

	   mkdir ls
	   cd ls
	   ...
	   <delete header lines and examine mailed archive>
	   ...
	   sh archive

SEE ALSO

     compress(1), mail(1), tar(1), uuencode(1)

HISTORY

     The shar command appeared in 4.4BSD.

BUGS

     The shar command makes no provisions for special types of files or files containing magic characters.  The shar command cannot handle files
     without a newline ('
') as the last character.

     It is easy to insert trojan horses into shar files.  It is strongly recommended that all shell archive files be examined before running them
     through sh(1).  Archives produced using this implementation of shar may be easily examined with the command:

	   egrep -v '^[X#]' shar.file

BSD
								   June 6, 1993 							       BSD