Thank you BrowserUk.

Now please allow me some follow-ups.

First, regarding the creation of $hoh. I tried replacing your 

my $hoh = {
    A => shared_clone( { NAME => 'aa' } ),
    B => shared_clone( { NAME => 'bb' } ),
};

[download]
with 
my $hoh = {
    A => { NAME => 'aa' },
    B => { NAME => 'bb' },
};
$hoh = shared_clone($hoh);

[download]
Why doesn't this work? doesn't 'shared_clone' does deep sharing?

This is not just a hypothetical question. I get my $hoh unshared (I might even retrieve it), that is, I do not create it at the same time I call this piece of code. So how can I take an unshared $hoh and use it here?

Second, if I understand correctly, you start a thread for each element of hoh. There are usually a few hundreds elements there, so I guess it's not as good idea. That's why I originally wanted yo use a thread pool, until you advised me otherwise.

Thanks again.

In reply to Re^4: Multi-threads newbie questions by daverave
in thread Multi-threads newbie questions by daverave

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