From: "Iñaki Baz Castillo" <ibc@...>
Date: 2008-09-10T19:49:25+09:00
Subject: Re: How to change the owner of a method in a block?

2008/9/10, Lex Williams <etaern@yahoo.com>:
> Lex Williams wrote:
>  > one way would be to use instance_eval :
>  >
>  > def new(&blk)
>  >    instance_eval &blk
>  > end
>
>  I meant to write :
>
>   def initialize(&blk)
>     instance_eval &blk
>   end

Really great :)

Let me just a question: how does affect using "instance_eval" in
performance? I've done some simple tests:

>> Benchmark.realtime { a=123; a2=a*2; a3=a*3 }
# => 1.97887420654297e-05
>> Benchmark.realtime { instance_eval 'a=123; a2=a*2; a3=a*3' }
# => 4.50611114501953e-05


Well, it seems that using "instance_eval" takes the double of time
than running the code directly. Is it significant?

Thanks.





-- 
Iñaki Baz Castillo
<ibc@aliax.net>