4. (Upd: 8 visible cores due to hyperthreading )

I don't understand the... surprise? To be clear, that's 

# ikegami
lock ${ $mutexes{$k} };
++$hash{$k};

[download]
vs 
# browseruk
lock ${ $hash{$k} };
++${ $hash{$k} };

[download]

(with proper initialisation)

In reply to Re^11: Avoid Locking Entire Hashes by ikegami
in thread Avoid Locking Entire Hashes by jagan_1234

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