Thanks!

I looked into it and could reproduce your results.

FWIW I tried best compression for gzip 

use IO::Compress::Gzip qw(gzip :constants);
sub compgzip
  {
      gzip \(shift) => \(my $output),
        -Level => Z_BEST_COMPRESSION;
      $output;
  }
use IO::Uncompress::Gunzip qw(gunzip);
sub uncompgzip
  {
      gunzip \(shift) => \(my $output);
      $output;
  }

[download]

and got 

------------------------------ Compression by gzip/gunzip

length of            data 210168
length of compressed data 42210
compressed to 20.1%
MATCH

[download]

update

I noticed that -Strategy => Z_RLE already led to compressed to 20.9% so my theory is that your runs are so homogeneously distributed that the second phase Huffmann couldn't squeeze more than 0.8% out of it.

Cheers Rolf
(addicted to the Perl Programming Language :)
Wikisyntax for the Monastery

In reply to Re^9: a random_data() implementation by LanX
in thread How to efficently pack a string of 63 characters by baxy77bax

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