Here is what i 've done..i change the schema by adding the TF(term frequency) for each term in each document like below:

Term1->DocId1TFposDocId2TFposDocId2TFpos......

I add the tf so to distinguish the doc ids and the positions..i suppose there is other way to distinguish the docs and the pos without to add more info but until now i didnt find it...

Here i save in the bit string 500000 documents where for each doc i keep the Tf and 4 positions... 
use strict;
use Devel::Size qw(size);


my $df=500000;my $tf=3;
my $wektor = '';
my $packed = '';
my $nr=0;
for(0 .. $df)
{
   vec ($wektor, $nr++, 32) = $_; # DOC ID......
   vec ($wektor, $nr++, 32) = $tf;  # TF......
   for(0 .. $tf)
   {
        vec ($wektor, $nr++, 32) = $_+10;  # POSITIONS
   }
}
print "Vector's size: " .
  size( $wektor ) . " bytes\n";

#print $nr,"\n";

###################### UNPACK VECTOR2.....
my %vec;
my $docID=0;
my $tf=0;
my $index=0;
my $Aa=time();
for(0 .. $df)
{
        $docID = vec ($wektor, $index++, 32);
        $tf = vec ($wektor, $index++, 32);
        $vec{$docID}=$tf;
#        print "Doc id: $docID\ttf: $tf\n";
        for(0 .. $tf)
        {
#            print "\t\tpositions: ",vec ($wektor, $index++, 32),"\n";
            vec ($wektor, $index++, 32);
        }    
}
print "unpack vector in \t",time()-$Aa,"  secs...(oh Yeah!!!)\n";


Vector's size: 12000052 bytes
unpack vector in        4  secs...(oh Yeah!!!)

[download]

As you can see from the code i save only the docId and the Tf in a hash without saving the positions..i am trying to find the appropriate structure to keep all this info..

Thats all for now ...i hope you find something faster....

In reply to Re^10: Do you really want to use an array there? by MimisIVI
in thread Do you really want to use an array there? by deprecated

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