People, I have script that does: - statistical processing from data in 50x32x20 (32,000) large input files - writes a small text file (22 lines with one or more columns of numbers) for each input file - read all small files back in again for final processing. Profiling shows that IO is taking up more than 60% of the time - short of making fewer, larger files for the data (which is inconvenient for random viewing/ processing of individual results) are there other alternatives to using the "File" and "IO" classes that would be faster? Thanks, Phil.