From: Nobuyoshi Nakada Date: 2009-03-08T22:27:39+09:00 Subject: [ruby-core:22737] Re: Ruby 1.9.1 and tail recursion optimization Moin, At Sun, 8 Mar 2009 22:22:24 +0900, Wolfgang N�dasi-Donner wrote in [ruby-core:22736]: > ...because I thought Ruby 1.9.1 has tail recursion optimization implemented. It's been implemented, but is disabled by the default. You need to edit vm_opts.h to enable it. -- Nobu Nakada