[plt-scheme] reading a whole file

Thomas Chust wrote:
> what about adding support for memory mapping to PLT Scheme? This would
> allow you to turn a whole file into a mutable or immutable byte string
>   
Only helpful for byte files, or for those rare text files whose encoding 
matches that of PLT Scheme's UCS-4 strings.  I agree, would certainly 
address the performance issues mentioned.

Ben