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
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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cksum(n)							       cksum								  cksum(n)

NAME
cksum - calculate a cksum(1) compatible checksum SYNOPSIS
package require Tcl 8.2 package require cksum ?1.0? ::crc::cksum ?-format format? message ::crc::cksum ?-format format? -filename file DESCRIPTION
This package provides a Tcl-only implementation of the cksum(1) algorithm based upon information provided at in the GNU implementation of this program as part of the GNU Textutils 2.0 package. COMMANDS
::crc::cksum ?-format format? message ::crc::cksum ?-format format? -filename file The command takes string data or a file name and returns a checksum value calculated using the cksum(1) algorithm. The result is formatted using the format(n) specifier provided or as an unsigned integer (%u) by default. OPTIONS
-filename name Return a checksum for the file contents instead of for parameter data. -format string Return the checksum using an alternative format template. EXAMPLES
% crc::cksum "Hello, World!" 2609532967 % crc::cksum -format 0x%X "Hello, World!" 0x9B8A5027 % crc::cksum -file cksum.tcl 1828321145 SEE ALSO
sum(n), crc32(n) AUTHORS
Pat Thoyts KEYWORDS
cksum, checksum, crc, crc32, cyclic redundancy check, data integrity, security crc 1.0 cksum(n)

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