Getopt::Long::Less - Like Getopt::Long, but with less features


This document describes version 0.08 of Getopt::Long::Less (from Perl distribution Getopt-Long-Less), released on 2016-12-03.


This module is a reimplementation of Getopt::Long, with less features/configurability. Only the subset which I'm currently using (which I think already serves a lot of common use cases for a lot of people too) is implemented.

Only three functions are implemented: GetOptions, GetOptionsFromArray, and Configure.

No configuring from use statement. No OO interface.

Much much less modes/configuration. No support for POSIXLY_CORRECT. We always do bundling (this is not Getopt::Long's default), we never ignore case (this is not Getopt::Long's default), we always permute, we always autoabbreviate, we always do GNU compatibility (allow --opt=VAL in addition to --opt VAL including allowing --opt=), we never do getopt_compat. Basically currently there's no mode you can configure (although pass_through might be added in the future).

No autoversion, no autohelp. No support to configure prefix pattern.

Currently no support for arrayref handler (e.g. "foo=s" => \@ary). No support for array desttype ('foo=s@' => ...).

Also, this module requires 5.010.

So what's good about this module? Slightly less compile time overhead, due to less code. This should not matter for most people. I just like squeezing out milliseconds from startup overhead of my CLI scripts. That's it :-)

Sample startup overhead benchmark:

                      Rate     load_gl load_glless   perl
 load_gl     77.72+-0.25/s          --      -42.4% -86.9%
 load_glless   135+-0.28/s 73.7+-0.67%          -- -77.3%
 perl         594.5+-2.1/s   665+-3.7% 340.4+-1.8%     --
 Average times:
   perl       :     1.6821ms
   load_glless:     7.4074ms
   load_gl    :    12.8667ms


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Source repository is at


Please report any bugs or feature requests on the bugtracker website

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.



If you want more features intead of less, try Getopt::Long::More.


perlancar <>


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This is free software; you can redistribute it and/or modify it under the same terms as the Perl 5 programming language system itself.