Indeed. I recognised that your solution is better as soon as I saw it, at laest in terms of memory usage. For short locks, it's equally slow compared to locking the whole hash, though. 
>perl ikegami.pl
Lock scalars ref took 1.648 seconds

>perl ikegami.pl
Lock scalars ref took 1.714 seconds

>perl ikegami.pl
Lock scalars ref took 1.702 seconds


>perl browseruk.pl
Lock scalars ref took 1.731 seconds

>perl browseruk.pl
Lock scalars ref took 1.543 seconds

>perl browseruk.pl
Lock scalars ref took 1.601 seconds

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In reply to Re^9: Avoid Locking Entire Hashes by ikegami
in thread Avoid Locking Entire Hashes by jagan_1234

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