Uhhhhmmmmm... no it don't! From the File::Tie man page:

I even remember looking at the source code for this module once to validate that statement. I used to think that the module loaded the whole file into memory but it doesn't.

However, there is a lot of overhead associated with File::Tie for certain operations. For instance I had some code once that looked something like: 

# considering @ry was the tie'd array:
my $last_line = $#ry + 1;

[download]
and found that if I visited that line multiple times it slowed my code way down. Just FWIW...

Peter L. Berghold -- Unix Professional
Peter -at- Berghold -dot- Net; AOL IM redcowdawg Yahoo IM: blue_cowdawg

In reply to Re^2: Help performing "random" access on very very large file by blue_cowdawg
in thread Help performing "random" access on very very large file by downer

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