The original added 100 1Mbyte strings to @a. Your example adds 50 * 10 = 500 1Mbyte strings to @a. Also, each thread will create a 1Mbyte private scalar; the original only created a single big string.

(The lack of locks is a bit troubling, but the aforementioned global interpretter lock is probably keeping your example out of trouble)

Perl Contrarian & SQL fanboy

In reply to Re^2: threads::shared variables not really shared... or are they? by renodino
in thread threads::shared variables not really shared... or are they? by Anonymous Monk

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