NAME

linespeed - Calculate how fast input lines are coming in

VERSION

This document describes version 0.003 of linespeed (from Perl distribution App-linespeed), released on 2020-05-04.

SYNOPSIS

 % tail -f some-log | linespeed
 Cur speed:  542.751Ki/s  Avg:  542.751Ki/s  Lines:   928384

DESCRIPTION

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.

OPTIONS

COMPLETION

This script has shell tab completion capability with support for several shells.

bash

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.

It is recommended, however, that you install modules using cpanm-shcompgen which can activate shell completion for scripts immediately.

tcsh

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.

It is also recommended to install shcompgen (see above).

other shells

For fish and zsh, install shcompgen as described above.

TODO

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).

HISTORY

First written in 2000-04-14.

HOMEPAGE

Please visit the project's homepage at https://metacpan.org/release/App-linespeed.

SOURCE

Source repository is at https://github.com/perlancar/perl-App-linespeed.

BUGS

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.

SEE ALSO

speedometer, https://excess.org/speedometer/

AUTHOR

perlancar <perlancar@cpan.org>

COPYRIGHT AND LICENSE

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.