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Re^2: [OT] The statistics of hashing.

by roboticus (Canon)
on Apr 02, 2012 at 17:45 UTC ( #963074=note: print w/ replies, xml ) Need Help??

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  1. or download this
        my $expected = (1-exp(-$cnt_rex/$VecSize))**$num_vecs;
    
  2. or download this
        $cum_collisions += $expected;
    
  3. or download this
    $ ./analyze_bloom.pl 14 3 17
    NumVecs=3
    ...
    16      32768:   25931  39.57  39.35   18293   11116    5475    1529  
    +   173 0.0239686508 185.0883611550
    16      65536:   41690  63.61  63.21   49093   18714   17246   10354  
    +  2779 0.1596613002 2882.5123468408
    16     131072:   56843  86.74  86.47  114278   21592   29488   36446  
    + 26752 0.5589731543 26626.3779623356
    
  4. or download this
    #!/usr/bin/perl
    #
    ...
            print "\n";
        }
    }
    

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