Manual Reference Pages - DEVEL::MAT::TOOL::SIZES (3)
"Devel::MAT::Tool::Sizes" - calculate sizes of SV structures
This Devel::MAT tool calculates the sizes of the structures around SVs.
The individual size of each individual SV is given by the size method,
though in several cases SVs can be considered to be part of larger structures
of a combined aggregate size. This tool calculates those sizes and adds them
to the UI.
The structural size is calculated from the basic size of the SV, added to
which for various types is:
The owned size is calculated by starting at the given SV and accumulating the
set of every strong outref whose refcount is 1. This is the set of all SVs the
original directly owns.
Arrays add the basic size of every non-mortal element SV.
Hashes add the basic size of every non-mortal value SV.
Codes add the basic size of their padlist and constant value, and all their
padnames, pads, constants and globrefs.
This tool adds the following SV methods.
@svs = $sv->structure_set
Returns the total set of the SVs structure.
$size = $sv->structure_size
Returns the size, in bytes, of the structure that the SV contains.
@svs = $sv->owned_set
Returns the set of every SV owned by the given one.
$size = $sv->owned_size
Returns the total size, in bytes, of the SVs owned by the given one.
Paul Evans <firstname.lastname@example.org>
|perl v5.20.3 ||DEVEL::MAT::TOOL::SIZES (3) ||2016-04-03 |
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