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<p>file might cause all files to be lost.</p>

<p>A challenge:<br/>
* Compression cannot take advantage of redundancy between files unless the compression window is larger than the size of an individual file; for example, gzip uses <a href="page.php?w=DEFLATE">DEFLATE</a>, which typically operates with a 32768-byte window, whereas bzip2 uses a <a href="page.php?w=Burrows-Wheeler_transform">Burrows-Wheeler transform</a> roughly 27 times bigger; xz defaults to 8&nbsp;MiB but supports significantly larger windows.</p>

<p>Generally, <a href="page.php?w=filename_extension">extensions</a></p><p>
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