From: Douglas Seifert <doug@...>
Date: 2010-09-13T01:29:23+09:00
Subject: Re: Key Associated w/ Maximum Value in Hash

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For fun:

http://www.pastie.org/1153968

$ ruby -v
ruby 1.9.1p378 (2010-01-10 revision 26273) [x86_64-linux]
$ ruby max_hash_value.rb
{0=>-18, 1=>-5, 2=>-31, 3=>44, 4=>-13, 5=>-1, 6=>23, 7=>5, 8=>22, 9=>37}
                                    user     system      total        real
max                             0.110000   0.000000   0.110000 (  0.270811)
max 1.9.X                       0.090000   0.000000   0.090000 (  0.242181)
select                          0.430000   0.000000   0.430000 (  1.270329)
select (cache max)              0.080000   0.000000   0.080000 (  0.147179)
sort_by                         0.160000   0.000000   0.160000 (  0.438671)
invert                          0.080000   0.000000   0.080000 (  0.279259)
invert (cache max)              0.060000   0.000000   0.060000 (  0.155440)


On Fri, Sep 10, 2010 at 5:20 AM, Ben Giddings <bg-rubytalk@infofiend.com>wrote:

> On Sep 9, 2010, at 23:00, Timothy Baron wrote:
>
>> I've tried several of these approaches, and they all work well.  I'm
>> curious, too, about which is the fastest, but for my small hashs,
>> there's no noticable difference.
>>
>
> Don't bother optimizing it for speed unless you are sure it's a bottleneck.
>  Choose whichever option is the most readable and maintainable.
>
> Ben
>
>
>
>

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