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Backtrace: Kernel(ThreadScalability)#len (method_missing_cv) at kernel/core/kernel.rb:648 ThreadScalability#reverse_string {} at bench_threaded_reverse.rb:21 Integer(Fixnum)#times at kernel/core/integer.rb:33 ThreadScalability#reverse_string at bench_threaded_reverse.rb:19 ThreadScalability#reverse_strings at bench_threaded_reverse.rb:60 ThreadScalability#do_test {} at bench_threaded_reverse.rb:46 Thread#initialize {} at kernel/core/thread.rb:83

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