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A Devel::MAT instance loads a heapdump file, and provides a container to store analysis tools to work on it. Tools may be provided that conform to the Devel::MAT::Tool API, which can help analyse the data and interact with the explorer user interface by using the methods in the Devel::MAT::UI package.

Devel::NYTProf is a powerful feature-rich perl source code profiler. * Performs per-line statement profiling for fine detail * Performs per-subroutine statement profiling for overview * Performs per-block statement profiling (the first profiler to do so) * Accounts correctly for time spent after calls return * Performs inclusive and exclusive timing of subroutines * Subroutine times are per calling location (a powerful feature) * Can profile compile-time activity, just run-time, or just END time * Uses novel techniques for efficient profiling * Sub-microsecond (100ns) resolution on systems with clock_gettime() * Very fast - the fastest statement and subroutine profilers for perl * Handles applications that fork, with no performance cost * Immune from noise caused by profiling overheads and I/O * Program being profiled can stop/start the profiler * Generates richly annotated and cross-linked html reports * Trivial to use with mod_perl - add one line to httpd.conf * Includes an extensive test suite * Tested on very large codebases

Devel::OverloadInfo returns information about overloaded operators for a given class (or object), including where in the inheritance hierarchy the overloads are declared and where the code implementing it is.

Perl has changed over time, gaining new features, new functions, increasing its flexibility, and reducing the impact on the C namespace environment (reduced pollution). The header file, typically ppport.h, written by this module attempts to bring some of the newer Perl features to older versions of Perl, so that you can worry less about keeping track of old releases, but users can still reap the benefit. Why you should use ppport.h in modern code: so that your code will work with the widest range of Perl interpreters possible, without significant additional work. Why you should attempt older code to fully use ppport.h: because the reduced pollution of newer Perl versions is an important thing, so important that the old polluting ways of original Perl modules will not be supported very far into the future, and your module will almost certainly break! By adapting to it now, you'll gain compatibility and a sense of having done the electronic ecology some good.

Devel::PackagePath is a Perl module to inspect and manipulate a Path based on a Package name.

Devel::PartialDump is a data dumper optimized for logging of arbitrary parameters. It attempts to truncate overly verbose data, in a way that is hopefully more useful for diagnostics warnings than warn Dumper(@stuff); Unlike other data dumping modules there are no attempts at correctness or cross referencing, this is only meant to provide a slightly deeper look into the data in question.

This package supplies variables that are "tied" to environment variables like 'PS1' and 'PS2', if read it takes the contents of the variable as a format string like the ones bash(1) uses to format the prompt. It is intended to be used in combination with the various ReadLine packages.

The Devel::Profile package is a Perl code profiler. This will collect information on the execution time of a Perl script and of the subs in that script. This information can be used to determine which subroutines are using the most time and which subroutines are being called most often.

This is an interactive shell for Perl, commonly known as a REPL - Read, Evaluate, Print, Loop. The shell provides for rapid development or testing of code without the need to create a temporary source code file. Through a plugin system, many features are available on demand. You can also tailor the environment through the use of profiles and run control files, for example to pre-load certain Perl modules when working on a particular project.

This module provides a single function, refcount(), which obtains the reference count of the object being pointed to by the passed reference value.