printout of large files. loop vs. flush at once

[ISAI student]

Hello all. We are seeing cases of slowdown when printing out files (our fileserver could be better).

I was wondering if there is any real difference between printing line by line vs. flushing out 1 big array, or multiline string. Right now, the scipts print out line by line. You can assume that the system's memory can handle it. Or in code:

...
print FH $f;
...
print FH $b;
...

vs.:

...
$printout .= $f;
...
$printout .= $b;
...
print FH $printout

Thanks.