Windows Cache Extension for PHP (Copy)

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　　Windows Cache Extension for PHP is a PHP accelerator that is used to increase the speed of PHP applications running on Windows and Windows Server. Once the Windows Cache Extension for PHP is enabled and loaded by the PHP engine, PHP applications can take advantage of the functionality without any code modifications.
Increase PHP application performance on Windows by caching PHP bytecode in  memory
　　Windows Cache Extension for PHP stores the PHP bytecode, the compiled version  of the PHP script, in memory making it available when subsequent executions of  the same script are needed helping to increase the overall PHP application  performance. The use of Windows Cache Extension for PHP allows the PHP bytecode  to be generated only once and to be reused each time the same PHP script is  executed.
Reduce file system I/O overhead by caching the PHP scripts in memory
　　Windows Cache Extension for PHP helps to reduce the latency of file  operations when PHP scripts are stored on remote UNC file shares. Windows Cache  Extension for PHP includes a file system cache that is used to store the content  of the PHP script files in shared memory, which reduces the amount of file  system operations performed by PHP engine.
Avoid redundant mapping for absolute paths by using relative file path cache
　　Windows Cache Extension for PHP caches the relation between relative and  absolute file paths, reducing the number of relative path resolutions performed  by the PHP engine. PHP applications that use many relative paths would perform  faster given the conversion to absolute paths is performed only once.
Features

• PHP 5.2 and PHP 5.3 support
  
• Configurable file cache
  
• Configurable PHP opcode cache
  
• Relative file path cache
  
• PHP functions to obtain information about the cache status
  

http://www.iis.net/extensions/WinCacheForPHP