From: Alexander Kellett <ruby-lists@...>
Date: 2005-03-01T05:37:21+09:00
Subject: Re: catting files

IO.read?
gets(nil)?

On Feb 28, 2005, at 9:17 PM, Mark Probert wrote:
>
> Hi ..
>
> There is approximately an order of magnitude difference in the 
> performance of
> these two snippets.  Is there a faster way of doing the pure Ruby 
> version?
>
>
> ### use the system call 'cat'
> def sys_cat
>     of = "plato.txt.cat"
>     clean(of)
>     l = `cat Plato/*.txt > #{of}`
> end
>
>
> ### open each file and copy it
> def rby_cat
>     of = "plato.txt.rby"
>     clean(of)
>     off = File.new(of, "w+")
>     Dir["Plato/*.txt"].each do |f|
>         text = IO.readlines(f)
>         off.puts text
>     end
>     off.close
> end
>
>                 user     system      total        real
> sys_cat     0.000000   0.015625   0.117188 (  0.167577)
> rby_cat     0.937500   0.085938   1.023438 (  1.064247)
>
>
> Thanks,
>
> -- 
> -mark.  (probertm at acm dot org)