WC -Sx- Jones wrote:
> Michael C. Davis wrote:
> > Hi, is there a good way to tell how much memory a given data structure is
> > consuming? I realize that there are issues in using this number to
> > determine runtime memory requirements (like the fact that, in some
> > circumstances, a running Perl process does not give back allocated memory
> > to the operating system until the process exits) but ... are there
> > guidelines like 100 bytes per REF, for example? Or is there a routine to
> > which I can pass my data structure and have it tell me the size? Thanks!
> >
>
> There is likely a shoreter trick, but to give
> you an idea path to follow -
>
> my @array;
>
> my $size = length @array;
> print "$size\n\n";
>
> @array = qw/one two three four/;
>
> $size = length @array;
> print "$size\n\n";
>
> $size = 0;
>
> foreach (@array) {
> $size += length;
> }
>
> print "$size\n\n";
>
> __END__
Sorry, but that's not really going to say much about memory itself. Perl is not
C, and this is one place where the difference really shows up. To dtermine
memory requirements, you would have also to determine the overhead-per-variable,
and add that into the formula. In Perl, this can be very significant.
Joseph
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