Threaded Collections

Threaded Collections is a package for iterating through collections
over multiple threads. With large collections, sometimes it can be
more efficient to process a collection in parallel, provided that the
collected items don’t have a interdependencies, or need to be processed
in a specific order.

Get the code from GitHub


require "threaded_collections"
threadcount = 2
arr = [1, 2, 3, 4, 5, 6, 7, 8, 9, 0]
tps =
tps.process(2) { |thread_id, item| puts "Thread #{thread_id} processed item: #{item}" }

I abstracted this pattern from a web services client that posted items from a collection, but
each request took a second to process. The remote service had plenty of threads available, so
I parallelized the task with this pattern.


I have no plans to break the interface but I do plan to make two major enhancements:

1. Make it possible to mix this functionality in to the Ruby iterators, so you don’t have create the
2. Make it work with fibers and processes in addition to threads.

Note: Don’t implement the Observer pattern inside the block!

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