It hangs,

That's scant information upon which to make a diagnosis.

You could try this version of Devel::Size. It uses far less memory and has much better trap handling than the official version. It'll probably allow you to do away with this: 

  next if ref($sv) eq 'GLOB'; # Devel::Size segfaults on this

[download]
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In reply to Re: Trying to profile my apps memory usage by BrowserUk
in thread Trying to profile my app's memory usage by robins

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