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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
Old 12-07-2019
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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FIND(1) 						      General Commands Manual							   FIND(1)

NAME
find - find files meeting a given condition SYNOPSIS
find directory expression EXAMPLES
find / -name a.out -print # Print all a.out paths find /usr/ast ! -newer f -ok rm {} ; # Ask before removing find /usr -size +20 -exec mv {} /big ; # move files > 20 blks find / -name a.out -o -name '*.o' -exec rm {}; # 2 conds DESCRIPTION
Find descends the file tree starting at the given directory checking each file in that directory and its subdirectories against a predi- cate. If the predicate is true, an action is taken. The predicates may be connected by -a (Boolean and), -o (Boolean or) and ! (Boolean negation). Each predicate is true under the conditions specified below. The integer n may also be +n to mean any value greater than n, -n to mean any value less than n, or just n for exactly n. -name s true if current filename is s (include shell wild cards) -size n true if file size is n blocks -inum n true if the current file's i-node number is n -mtime ntrue if modification time relative to today (in days) is n -links ntrue if the number of links to the file is n -newer ftrue if the file is newer than f -perm n true if the file's permission bits = n (n is in octal) -user u true if the uid = u (a numerical value, not a login name) -group gtrue if the gid = g (a numerical value, not a group name) -type x where x is bcdfug (block, char, dir, regular file, setuid, setgid) -xdev do not cross devices to search mounted file systems Following the expression can be one of the following, telling what to do when a file is found: -print print the file name on standard output -exec execute a MINIX command, {} stands for the file name -ok prompts before executing the command SEE ALSO
test(1), xargs(1). FIND(1)
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