memoize::storable5.18(3pm) [mojave man page]

Memoize::Storable(3pm)					 Perl Programmers Reference Guide				    Memoize::Storable(3pm)

NAME

       Memoize::Storable - store Memoized data in Storable database

DESCRIPTION

       See Memoize.

perl v5.18.2							    2013-11-04						    Memoize::Storable(3pm)

ExpireLRU(3pm)						User Contributed Perl Documentation					    ExpireLRU(3pm)

NAME

       Memoize - Expiry plug-in for Memoize that adds LRU cache expiration

SYNOPSIS

	   use Memoize;

	   memoize('slow_function',
		   TIE => [Memoize::ExpireLRU,
			   CACHESIZE => n,
			  ]);

       Note that one need not "use" this module. It will be found by the Memoize module.

       The argument to CACHESIZE must be an integer. Normally, this is all that is needed. Additional options are available:

	       TUNECACHESIZE => m,
	       INSTANCE => 'descriptive_name',
	       TIE => '[DB_File, $filename, O_RDWR | O_CREATE, 0666]'

DESCRIPTION

       For the theory of Memoization, please see the Memoize module documentation. This module implements an expiry policy for Memoize that
       follows LRU semantics, that is, the last n results, where n is specified as the argument to the "CACHESIZE" parameter, will be cached.

PERFORMANCE TUNING

       It is often quite difficult to determine what size cache will give optimal results for a given function. To aid in determining this,
       ExpireLRU includes cache tuning support. Enabling this causes a definite performance hit, but it is often useful before code is released to
       production.

       To enable cache tuning support, simply specify the optional "TUNECACHESIZE" parameter with a size greater than that of the "CACHESIZE"
       parameter.

       When the program exits, a set of statistics will be printed to stderr. If multiple routines have been memoized, separate sets of statistics
       are printed for each routine. The default names are somewhat cryptic: this is the purpose of the "INSTANCE" parameter. The value of this
       parameter will be used as the identifier within the statistics report.

DIAGNOSTIC METHODS

       Two additional routines are available but not exported. Memoize::ExpireLRU::ShowStats returns a string identical to the statistics report
       printed to STDERR at the end of the program if test caches have been enabled; Memoize::ExpireLRU::DumpCache takes the instance name of a
       memoized function as a parameter, and returns a string describing the current state of that instance.

AUTHOR

       Brent B. Powers (B2Pi), Powers@B2Pi.com

       Copyright(c) 1999 Brent B. Powers. All rights reserved. This program is free software, you may redistribute it and/or modify it under the
       same terms as Perl itself.

SEE ALSO

       Memoize

perl v5.10.1							    2000-04-12							    ExpireLRU(3pm)