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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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bup-drecurse(1) 					      General Commands Manual						   bup-drecurse(1)

NAME
bup-drecurse - recursively list files in your filesystem SYNOPSIS
bup drecurse [-x] [-q] [--exclude path] [--exclude-from filename] [--profile] <path> DESCRIPTION
bup drecurse traverses files in the filesystem in a way similar to find(1). In most cases, you should use find(1) instead. This program is useful mainly for testing the file traversal algorithm used in bup-index(1). Note that filenames are returned in reverse alphabetical order, as in bup-index(1). This is important because you can't generate the hash of a parent directory until you have generated the hashes of all its children. When listing files in reverse order, the parent directory will come after its children, making this easy. OPTIONS
-x, --xdev, --one-file-system don't cross filesystem boundaries. -q, --quiet don't print filenames as they are encountered. Useful when testing performance of the traversal algorithms. --exclude=path a path to exclude from the backup (can be used more than once) --exclude-from=filename a file that contains exclude paths (can be used more than once) --profile print profiling information upon completion. Useful when testing performance of the traversal algorithms. EXAMPLE
bup drecurse -x / SEE ALSO
bup-index(1) BUP
Part of the bup(1) suite. AUTHORS
Avery Pennarun <apenwarr@gmail.com>. Bup unknown- bup-drecurse(1)
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