Also, aren't newer versions of perl optimized such that when map is used in a void context, the extra work that differentiates it from foreach and from for optimized away? (Source: http://www.perlmonks.org/index.pl?node_id=296742)

The optimisation relating to map in a void context is that map doesn't build the return list (what would be returned from the map) when it detects it is called in a void context. It doesn't (I think "can't", but I not sure of that), stop the input list being built.

From my testing, the outrageous use of memory only occurs when I am using Threads and Thread::Queue, otherwise the two perform similarly.

Post -- or send me via the mail ID on my home page -- the real code. Then we'll see.

With the rise and rise of 'Social' network sites: 'Computers are making people easier to use everyday'
Examine what is said, not who speaks -- Silence betokens consent -- Love the truth but pardon error.
"Science is about questioning the status quo. Questioning authority".
In the absence of evidence, opinion is indistinguishable from prejudice.

The start of some sanity?

In reply to Re^3: Thread::Queue memory issue with nested maps but not foreach loops... by BrowserUk
in thread Thread::Queue memory issue with nested maps but not foreach loops... by jmmitc06

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