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Installing Zend OPcache for use with Enterprise Server 9

Installing Zend OPcache for use with Enterprise Server 9

The Zend OPcache module (formerly known as Zend Optimizer+) provides faster PHP execution through opcode caching and optimization. It improves PHP performance by storing pre-compiled script bytecode in the shared memory. This eliminates the stages of reading code from the disk and compiling it on future access. In addition, it applies a few bytecode optimization patterns that make code execution faster.

Note: Using a PHP optimizer can be especially beneficial for improving Enterprise features such as the auto-complete functionality of adding tags to a Web article. See About adding tags to Web articles.

How it works

PHP is an interpreted language. This means that each time a PHP generated page is requested, the server must read in the various files needed and "compile" them into something the machine can understand (opcode). A typical web page requires more than a dozen of these bits of code to be compiled. Opcode cache mechanisms preserve this generated code in cache so that it only needs to be generated once to serve hundreds or millions of subsequent requests. Enabling opcode cache will reduce the time it takes to generate a page by up to 90%.

Why Zend OPcache?

Although many different opcode cache modules are available — such as XCache, eAccelerator and APC — WoodWing has decided to go for Zend OPcache because of the following reasons:

  • Tests have shown us that this optimizer is by far the fastest out there
  • It is available as open source
  • It is integrated by default in PHP 5.5

Installation

The steps for installing Zend OPCache vary depending on the version of PHP that is used.

Note: For more information, see the PHP documentation OPCache installation.

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