>>>>> "J" == Jim Freeze <jim / freeze.org> writes:

J> require 'mmapio'
J> MMapIO.new(writefile, "w") { |f|

   Good luck, for this

J>   MMapIO.new(readfile).each { |line
J>     # start rockin'
J>     f << line
J>   }
J> }


J> Has this been written before I start to do it myself?

 yes, but don't expect that it will be faster ...


Guy Decoux