numspeed - Calculate how fast a number is changing
This document describes version 0.001 of numspeed (from Perl distribution App-numspeed), released on 2016-10-01.
% ( while true; do du -sb /some/file/being/copied; sleep 1; done ) | numspeed Cur speed: 4.5M/s Avg: 4.1M/s_
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.
numspeed
It exits if it cannot read a number from input.
Show speed in the last minute, 5 mins, 15 mins (or customizable).
Instead of the default 1024, use power of 1000.
This script has shell tab completion capability with support for several shells.
To activate bash completion for this script, put:
complete -C numspeed numspeed
in 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.
~/.bashrc
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.
shcompgen
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.
~/.tcshrc
It is also recommended to install shcompgen (see above).
For fish and zsh, install shcompgen as described above.
Please visit the project's homepage at https://metacpan.org/release/App-numspeed.
Source repository is at https://github.com/perlancar/perl-App-numspeed.
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.
linespeed
perlancar <perlancar@cpan.org>
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.
To install App::numspeed, copy and paste the appropriate command in to your terminal.
cpanm
cpanm App::numspeed
CPAN shell
perl -MCPAN -e shell install App::numspeed
For more information on module installation, please visit the detailed CPAN module installation guide.