From: "Роман Ткаленко" <rain.roman@...>
Date: 2012-03-25T01:45:03+09:00
Subject: Ruby speed compared to C in a simple calculations.

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#works for 3.55 mins
P = 295075153
o1 = 210205973
o2 = 22795300
(0 .. P).each do | i |
    if i ^ (i ^ o1) == o1 and ((i * 2 + 5) % P) ^ (((i ^ o1) * 3 + 7) % P)
== o2
        puts i
        break
    end
end
Code written in C gives me the solution in only 2 seconds. I suppose that
it's called not by ruby slowlyness, but my shitty coding abilities. Cuold
tou please tell me the weaknesse of the code?

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<div>#works for 3.55 mins</div><div>P =3D 295075153</div><div>o1 =3D 210205=
973</div><div>o2 =3D 22795300</div><div>(0 .. P).each do | i |</div><div>=
=C2=A0 =C2=A0 if i ^ (i ^ o1) =3D=3D o1 and ((i * 2 + 5) % P) ^ (((i ^ o1) =
* 3 + 7) % P) =3D=3D o2</div>

<div>=C2=A0 =C2=A0 =C2=A0 =C2=A0 puts i</div><div>=C2=A0 =C2=A0 =C2=A0 =C2=
=A0 break</div><div>=C2=A0 =C2=A0 end</div><div>end</div><div>Code written =
in C gives me the solution in only 2 seconds. I suppose that it&#39;s calle=
d not by ruby slowlyness, but my shitty coding abilities. Cuold tou please =
tell me the weaknesse of the code?</div>


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