Hi, If the development time is an important factor, then probably it is better to use Ruby NArray where the data byte size can really be controlled (1/2/4 bytes), rather than using Strings. Also, I think NArray gives more natural built-in methods then a string (e.g., the String [fixNum] method returns the code of the character at that position, instead of the "direct value"). Regards, Bill ============================================================================ Christian Szegedy <szegedy / nospam.or.uni-bonn.de> wrote: > You can use Strings in Ruby to achieve the same memory performance. > Of course, you are right about the execution performance, but > the development time is also an important factor. > Best Regards, Christian