On 17.01.2009 09:10, George George wrote:
> Thank you so much for all the replies. Here is a simple benchmark for 
> Brian and Jesus approaches. I Run it on ubuntu 8.04, 1GB RAM, 2 CPUs 
> 3.40GHz.
> 
> ....
> ..
> require 'benchmark'
>  Benchmark.bm  do |bm|
> 
>   bm.report("Brian:") do
>   expand_seq "t[ac][tc]aaattaag[ga]gaag[ac]ttggtgga" do |seq|
>     #puts seq
>   end
>  end
> 
> bm.report("Jesus:") do
>   /t[ac][tc]aaattaag[ga]gaag[ac]ttggtgga/.generate
>  end
>  end
> 
> ser     system      total        real
> Brian:  0.000000   0.000000   0.000000 (  0.000642)
> Jesus:  0.000000   0.000000   0.000000 (  0.003574)

You probably need to execute each variant in a loop multiple times to 
get meaningful results.

Kind regards

	robert

-- 
remember.guy do |as, often| as.you_can - without end