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While I'm looking into the possibilities provided by the other posters, these tips don't require more advanced knowledge than I have ;-).

Thank you for warning me about the anonymous array overhead. Will change that immediately.

Furthermore, I'm on little endian, so the string comparison should work just fine. However, I don't want to sort on the remainder of the string as it is now. Will run a test first, and post the results here.

Thanks a lot,

"We are not alone"(FZ)

Update: Must have made some difference in memory usage, but it's still way too much. Made a rough calculation of the memory usage with system monitor (gnome) and this little script:

#!/usr/bin/perl my $size=1E6; my $f = 2; print "Increasing memory print each step by a factor $f\n\n"; while(1){ print "\tCreating array of $size items...Press enter to continue.... +"; my $b = <STDIN>; my @a=1..$size; print "...done. Press enter to continue."; $b = <STDIN>; chomp $b; $b=~ /[qxQX]/ and exit; $size *= $f; }
It's about 44 megabytes for every million items in an array. No way my 12 M records are going to fit in physical memory. I'm back to Radixsort and alike.

In reply to Re: Re: Sorting data that don't fit in memory by jeroenes
in thread Sorting data that don't fit in memory by jeroenes

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