FWIW

HTML::Parse returns a HTML::Tree object

Its a known limitation of HTML::Tree, you have to delete() the tree to free the memory, otherwise it will leak a LOT of memory (circular references are circular, keep objects alive forever, unless they're weak)

Rejected in 2005/06 Bug #12283 for HTML-Tree: Use weaken to avoid ->delete()?

With delete there doesn't seem to be much of a leak 

perl -MHTML::Parse -le " system qq[pslist.exe -m $$ 2>NUL]; for(1..400
+00){ $ju = parse_html(q{ <p>yo</p> }); $junk = $ju->format; $ju->dele
+te; } system qq[pslist.exe -m $$ 2>NUL]; "

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In reply to Re^2: Serious memory leak when using LWP by Anonymous Monk
in thread Serious memory leak when using LWP by ajmcello

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