[pm-h] Perl merging many large files into one

[Michael R. Davis]

G. Wade,
 
>> Can anyone tell me if the diamond operator is optimized in a print
>> statement or does it really read the file into memory then print it? 
>
>The real question is are you doing more than just concatenating the
>files? 
 
I guess this comment sparked research and `tail` actually does what I need to do.
 
qx{cat X > out.txt; tail --lines=+2 Y Z >> out.txt};
 
Maybe I'll just head out to the command line it just won't be portable.  There will be about 300 CSV files to merge in the process but I only need the header row on the first one.
 
But, performance is not really as big of a concern as memory for this process.
Thanks,
Mike 
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