> Bryan Harris schreef: > >> If I'm reading in many-megabyte files, is it considered to be more >> efficient to read it into an array, then loop over the array? > > Line-by-line is fine. > > Your Operating System will read from disk in blocks, so stop believing > that each line needs a disk access. > (unless each line is about the size of a block, but blocks can easily be > 2 MB) > > >> I realize the [for-loop] will use more memory, but what's a few > megabytes >> in today's computers? > > That can really byte, when there are only a few megabytes left to spare. > You don't want a memory fight in your system, because that slows down > all processes considerably, because it will start swapping memory blocks > to disk for a moment, then read them back in, etc.
I figured the OS would load the file in blocks, but I thought the blocks might only be 12k or something like that. I am surprised at the levels of concern over memory reading in <20 MB files. Don't most people have 1+ GB now? I've got 2... I'm just surprised that using at most 1% of my total ram would be a concern. Thanks for the responses, I'll do the line by line. - B -- To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] <http://learn.perl.org/> <http://learn.perl.org/first-response>
