Perl and memory leak handling

gistfile1.txt

## Memory leaks

    Tracking memory leaks:
        Devel::Arena - sv_stats() returns arena structures used for SV allocation
    *   Devel::Cycle - find_cycle($ref) returns all cycles found in $ref and the perl variables they point to
        Devel::Gladiator - walk Perl variable arena
        Devel::Leak - deprecated by Devel::LeakTrace::Fast
        Devel::LeakTrace - deprecated by Devel::LeakTrace::Fast
    *   Devel::LeakTrace::Fast - prints leaked SV's and line numbers at END.
        Data::Structure::Util - has_circular_ref($ref) returns ref to link in $ref that is circular or false.
        Test::LeakTrace - no_leaks_ok(), etc.
        Test::Memory::Cycle - Based on Devel::Cycle, offers memory_cycle_ok(), etc.

    Tracking XS memory leaks:
        Devel::Peek - Core module that dumps perlguts info. The examples section has useful perlguts explanations.
        Devel::Plumber - use gdb to find and report leaks
        Devel::Valgrind::Client - related to Test::Valgrind.
        Test::Valgrind - just tracks Newx and malloc-like, not perl objects.

    Memory allocation size:
        Devel::Size - print size with and without ref traversals.
    *   Devel::Size::Report - print full report of every ref in a var.
    *   Devel::SizeMe - Tim Bunce's graphical object dealie

    Object-only:
        Devel::Events::Handler::ObjectTracker - track every blessed obj created or destroyed via object_bless() and object_destroy()
        Devel::Leak::Object - track select or every blessed obj
        Devel::LeakGuard::Object - derived from Devel::Leak::Object; adds leakguard { ... } closure.

    Fixing memory leaks:
    *   Data::Decycle - can also decycle coderefs! weaken_deeply(), decycle_deeply(), recsub { ... } - leak free closures
        Data::Structure::Util - circular_off($ref) - traverse $ref for cyclical refs and weaken them.
    *   Object::Destroyer - create sentries for objects and inform them what to do during destruction
        Scalar::Util - weaken()
        Sub::Recursive - anonymous memory leak free subs. mutually_recursive(), recursive()

    *   Memory::Usage - http://perlmaven.com/eliminate-circular-reference-memory-leak-using-weaken (2013)

    Display allocated and held memory:
    *    Devel::SizeMe - http://blog.timbunce.org/2012/10/05/introducing-develsizeme-visualizing-perl-memory-use/

    Sort me:
        Devel::MAT
        Test::MemoryGrowth

    Articles on leaks:
        How to use Object::Destroyer: http://www.perl.com/pub/2007/06/07/better-code-through-destruction.html
        PM leak article collection: http://www.perlmonks.org/?node_id=336883
        http://www.perlmonks.org/?node_id=419754
        http://perldoc.perl.org/perldebguts.html#Debugging-Perl-memory-usage
        http://blog.timbunce.org/2012/10/05/introducing-develsizeme-visualizing-perl-memory-use/

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