NAME
numspeed - Calculate how fast a number is changing
VERSION
This document describes version 0.001 of numspeed (from Perl distribution App-numspeed), released on 2016-10-01.
SYNOPSIS
% ( while true; do du -sb /some/file/being/copied; sleep 1; done ) | numspeed
Cur speed: 4.5M/s Avg: 4.1M/s_DESCRIPTION
numspeed reads a number from standard input repeatedly. It then calculates how fast that number is changing (increasing/decreasing). It can be used to measure, e.g. how fast a file is being copied by feeding the sizes of the file to it.
It exits if it cannot read a number from input.
TODO
Show speed in the last minute, 5 mins, 15 mins (or customizable).
OPTIONS
--si
Instead of the default 1024, use power of 1000.
COMPLETION
This script has shell tab completion capability with support for several shells.
bash
To activate bash completion for this script, put:
complete -C numspeed numspeedin your bash startup (e.g. ~/.bashrc). Your next shell session will then recognize tab completion for the command. Or, you can also directly execute the line above in your shell to activate immediately.
It is recommended, however, that you install shcompgen which allows you to activate completion scripts for several kinds of scripts on multiple shells. Some CPAN distributions (those that are built with Dist::Zilla::Plugin::GenShellCompletion) will even automatically enable shell completion for their included scripts (using shcompgen) at installation time, so you can immadiately have tab completion.
tcsh
To activate tcsh completion for this script, put:
complete numspeed 'p/*/`numspeed`/'in your tcsh startup (e.g. ~/.tcshrc). Your next shell session will then recognize tab completion for the command. Or, you can also directly execute the line above in your shell to activate immediately.
It is also recommended to install shcompgen (see above).
other shells
For fish and zsh, install shcompgen as described above.
HOMEPAGE
Please visit the project's homepage at https://metacpan.org/release/App-numspeed.
SOURCE
Source repository is at https://github.com/perlancar/perl-App-numspeed.
BUGS
Please report any bugs or feature requests on the bugtracker website https://rt.cpan.org/Public/Dist/Display.html?Name=App-numspeed
When submitting a bug or request, please include a test-file or a patch to an existing test-file that illustrates the bug or desired feature.
SEE ALSO
AUTHOR
perlancar <perlancar@cpan.org>
COPYRIGHT AND LICENSE
This software is copyright (c) 2016 by perlancar@cpan.org.
This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.