NAME Log::Any::IfLOG - Load Log::Any only if "logging is enabled" VERSION This document describes version 0.090 of Log::Any::IfLOG (from Perl distribution Log-Any-IfLOG), released on 2019-01-09. SYNOPSIS use Log::Any::IfLOG '$log'; DESCRIPTION This module is a drop-in replacement/wrapper for Log::Any to be used from your modules. This is a quick-hack solution to avoid the cost of loading Log::Any under "normal condition". Since Log::Any 1.00, startup overhead increases to about 7-10ms on my PC/laptop (from under 1ms for the previous version). Because I want to keep startup overhead of CLI apps under 50ms (see Perinci::CmdLine::Lite) to keep tab completion from getting a noticeable lag, every millisecond counts. This module will only load Log::Any when "logging is enabled". Otherwise, it will just return without loading anything. If $log is requested in import, a fake object is returned that responds to methods like "debug", "is_debug" and so on but will do nothing when called and just return 0. To determine "logging is enabled": * Is $ENABLE_LOG defined? This package variable can be used to force "logging enabled" (if true) or "logging disabled" (if false). Normally, you don't need to do this except for testing. * Is Log::Any is already loaded (from %INC)? If Log::Any is already loaded, it means we have taken the overhead hit anyway so logging is enabled. * Is one of log-related environment variables true? If one of LOG, "TRACE", or "DEBUG", or "VERBOSE", or "QUIET", or "LOG_LEVEL" is true then logging is enabled. These variables are used by Perinci::CmdLine. Otherwise, logging is disabled. VARIABLES $ENABLE_LOG => bool This setting can be forced to force loading Log::Any or not. ENVIRONMENT LOG => bool TRACE => bool DEBUG => bool VERBOSE => bool QUIET => bool LOG_LEVEL => str HOMEPAGE Please visit the project's homepage at . SOURCE Source repository is at . BUGS 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. SEE ALSO Log::Any AUTHOR perlancar COPYRIGHT AND LICENSE This software is copyright (c) 2019, 2015 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.