linespeed - Calculate how fast input lines are coming in
This document describes version 0.003 of linespeed (from Perl distribution App-linespeed), released on 2020-05-04.
% tail -f some-log | linespeed Cur speed: 542.751Ki/s Avg: 542.751Ki/s Lines: 928384
linespeed receives lines from standard input (or files) and calculates how fast the lines are coming in. It can be used to measure, e.g. the current HTTP requests/sec a server is getting from the webserver access log.
linespeed
This script has shell tab completion capability with support for several shells.
To activate bash completion for this script, put:
complete -C linespeed linespeed
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 modules using cpanm-shcompgen which can activate shell completion for scripts immediately.
To activate tcsh completion for this script, put:
complete linespeed 'p/*/`linespeed`/'
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).
shcompgen
For fish and zsh, install shcompgen as described above.
Add option: --si to use power of 1000 not 1024 (but 1000 is the default).
Show speed in the last minute, 5 mins, 15 mins (or customizable).
First written in 2000-04-14.
Please visit the project's homepage at https://metacpan.org/release/App-linespeed.
Source repository is at https://github.com/perlancar/perl-App-linespeed.
Please report any bugs or feature requests on the bugtracker website https://rt.cpan.org/Public/Dist/Display.html?Name=App-linespeed
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.
speedometer, https://excess.org/speedometer/
perlancar <perlancar@cpan.org>
This software is copyright (c) 2020, 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::linespeed, copy and paste the appropriate command in to your terminal.
cpanm
cpanm App::linespeed
CPAN shell
perl -MCPAN -e shell install App::linespeed
For more information on module installation, please visit the detailed CPAN module installation guide.