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Groups > comp.lang.ruby > #3207
| From | "WJ" <w_a_x_man@yahoo.com> |
|---|---|
| Newsgroups | comp.lang.ruby |
| Subject | Re: Tail Call Optimization (Tail Recursion) |
| Date | 2011-04-20 04:30 +0000 |
| Organization | NewsGuy - Unlimited Usenet $19.95 |
| Message-ID | <iolngf02pt9@enews1.newsguy.com> (permalink) |
| References | (2 earlier) <iohuqr02fa2@enews2.newsguy.com> <BANLkTindWcQ=Ndy5Cxo5egCSSwNixExtkw@mail.gmail.com> <ioidrk02rnf@enews5.newsguy.com> <BANLkTikmX9apEJYn72r+PGCs5AL35OqUWA@mail.gmail.com> <iolmeo02p4k@enews1.newsguy.com> |
WJ wrote:
> (time (set! bigfib (fib 50000)))
> 562 ms real time
> 516 ms cpu time (500 user, 16 system)
This Ruby version runs in about 0.6 seconds:
def fib n
a,b = 0,1
2.upto(n){
a,b = b, a+b
}
b
end
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Tail Call Optimization (Tail Recursion) Terry Michaels <cmhoward@frigidcode.com> - 2011-04-18 00:59 -0500
Re: Tail Call Optimization (Tail Recursion) 7stud -- <bbxx789_05ss@yahoo.com> - 2011-04-18 12:29 -0500
Re: Tail Call Optimization (Tail Recursion) "WJ" <w_a_x_man@yahoo.com> - 2011-04-18 18:10 +0000
Re: Tail Call Optimization (Tail Recursion) Louis-Philippe <default@spiralix.org> - 2011-04-18 15:40 -0500
Re: Tail Call Optimization (Tail Recursion) "WJ" <w_a_x_man@yahoo.com> - 2011-04-18 22:27 +0000
Re: Tail Call Optimization (Tail Recursion) Louis-Philippe <default@spiralix.org> - 2011-04-19 07:28 -0500
Re: Tail Call Optimization (Tail Recursion) "WJ" <w_a_x_man@yahoo.com> - 2011-04-20 04:12 +0000
Re: Tail Call Optimization (Tail Recursion) "WJ" <w_a_x_man@yahoo.com> - 2011-04-20 04:30 +0000
Re: Tail Call Optimization (Tail Recursion) Robert Klemme <shortcutter@googlemail.com> - 2011-04-20 06:37 -0500
Re: Tail Call Optimization (Tail Recursion) Vincent Manis <vmanis@telus.net> - 2011-04-18 19:41 -0500
Re: Tail Call Optimization (Tail Recursion) Steve Klabnik <steve@steveklabnik.com> - 2011-04-18 20:42 -0500
Re: Tail Call Optimization (Tail Recursion) Vincent Manis <vmanis@telus.net> - 2011-04-18 21:51 -0500
Re: Tail Call Optimization (Tail Recursion) Michael Edgar <adgar@carboni.ca> - 2011-04-18 22:12 -0500
Re: Tail Call Optimization (Tail Recursion) Steve Klabnik <steve@steveklabnik.com> - 2011-04-19 08:48 -0500
Re: Tail Call Optimization (Tail Recursion) Brian Candler <b.candler@pobox.com> - 2011-04-19 08:56 -0500
Re: Tail Call Optimization (Tail Recursion) Steve Klabnik <steve@steveklabnik.com> - 2011-04-19 10:07 -0500
Re: Tail Call Optimization (Tail Recursion) Steve Klabnik <steve@steveklabnik.com> - 2011-04-18 12:39 -0500
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