Md5sum is running very slowly

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LEARN ABOUT PHP

md5_file

MD5_FILE(3)								 1							       MD5_FILE(3)

md5_file - Calculates the md5 hash of a given file

SYNOPSIS

       string md5_file (string	$filename, [bool  $raw_output = false])

DESCRIPTION

	Calculates  the  MD5 hash of the file specified by the $filename parameter using the RSA Data Security, Inc. MD5 Message-Digest Algorithm,
       and returns that hash. The hash is a 32-character hexadecimal number.

PARAMETERS

	      o $filename
		- The filename

	      o $raw_output
		- When TRUE, returns the digest in raw binary format with a length of 16.

RETURN VALUES

	Returns a string on success, FALSE otherwise.

CHANGELOG

       +--------+---------------------------------------------------+
       |Version |						    |
       |	|						    |
       |	|		     Description		    |
       |	|						    |
       +--------+---------------------------------------------------+
       | 5.1.0	|						    |
       |	|						    |
       |	|  Changed the function to use the streams API.  It |
       |	| means  that  you  can  use it with wrappers, like |
       |	| md5_file('http://example.com/..')		    |
       |	|						    |
       +--------+---------------------------------------------------+
EXAMPLES

       Example #1

	      Usage example of md5_file(3)

	      <?php
	      $file = 'php-5.3.0alpha2-Win32-VC9-x64.zip';

	      echo 'MD5 file hash of ' . $file . ': ' . md5_file($file);
	      ?>

SEE ALSO

       md5(3), sha1_file(3), crc32(3).

PHP Documentation Group 													       MD5_FILE(3)

Shell Programming and Scripting