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Re: Splitting large array for threads.

by Anonymous Monk
on Jun 16, 2014 at 21:39 UTC ( #1090078=note: print w/replies, xml ) Need Help??


in reply to Splitting large array for threads.

The latest version of threads distributed with Perl v5.20 states:

WARNING

The "interpreter-based threads" provided by Perl are not the fast, lightweight system for multitasking that one might expect or hope for. Threads are implemented in a way that make them easy to misuse. Few people know how to use them correctly or will be able to provide help.

The use of interpreter-based threads in perl is officially discouraged.

I believe this is the relevant discussion on P5P.

You may want to look into doing this with multiple processes instead. A central manager process could take responsibility of handing out reasonably-sized chunks out to the workers. See for example fork or Parallel::ForkManager, as well as perlipc.

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Re^2: Splitting large array for threads.
by Anonymous Monk on Jun 17, 2014 at 03:17 UTC

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[ovedpo15]: how fast and a good way to print error if more than one out of three variables are defined? for example if there are $a $b $c. I want that if for example $a and $b are defined - print error (also for $a and $c or $b and $c)
[ovedpo15]: its easy with three "if"s or one long "if" but is there a "nice" way :)

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