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This module figures out the real sizes of Perl variables in bytes. Call functions with a reference to the variable you want the size of. If the variable is a plain scalar it returns the size of the scalar. If the variable is a hash or an array, use a reference when calling.

This module provide a lightweight IOC or Inversion of Control framework. Inversion of Control, sometimes called Dependency Injection, is a component management style which aims to clean up component configuration and provide a cleaner, more flexible means of configuring a large application.

Devel::KYTProf is a perl code profiler to explore IO blocking time.

Event::Join is a perl module to join multiple "events" into one.

The Heap collection of modules provide routines that manage a heap of elements. A heap is a partially sorted structure that is always able to easily extract the smallest of the elements in the structure (or the largest if a reversed compare routine is provided).

File::Binary is a perl module that provides an interface to modify and read binary files.

File::Dir::Dumper - dump directory structures' meta-data in a consistent and machine-readable way.

File::chmod is a utility that allows you to bypass system calls or bit processing of a file's permissions. It overloads the chmod() function with its own that gets an octal mode, a symbolic mode, or an "ls" mode. If you wish not to overload chmod(), you can export symchmod() and lschmod(), which take, respectively, a symbolic mode and an "ls" mode.

Find::Lib is a perl helper to smartly find libs to use in the filesystem tree.

This module is used by other modules to provide a pluggable filesystem.