lengthy backend jobs in CF

One of our largest web applications is written in CF.  Some of the CFC's I have developed are increasingly complex as the years go by.  It is becoming obvious that a web app was not meant to handle these things.  For instance I have one that parses a text file and places that data into a database.  The text files can be anywhere from 50kb to 2mb.  A CFC like this could take forever to accomplish this task or it could get hung up by running out of memory. 

Would it behoove me to rewrite these scripts in java or something so that my other users don't experience performance problems when im running these huge tasks?  would Java, Ruby or C handle this type of this all that much more efficiently??

TIA