PHP performance optimization produces highly optimized code_PHP tutorial

1. Upgrade PHP to the latest version

The easiest way to improve performance is to continuously upgrade and update the PHP version.

　2. Use an analyzer

There are many reasons why a website may run slowly, and web applications are extremely complex and confusing. And one possibility lies in the PHP code itself. This analyzer can help you quickly identify the code causing bottlenecks and improve the overall performance of your website.

The Xdebug PHP extension provides powerful functions that can be used for debugging and code analysis. It is convenient for developers to directly track the execution of scripts and view comprehensive data in real time. This data can also be imported into the visualization tool KCachegrind.

　3. Error detection report

PHP supports powerful error detection functions, which facilitates you to check errors in real time, from more important errors to relatively small running prompts. A total of 13 independent report levels are supported, and you can flexibly match these levels to generate user-defined detection reports.

　4. Use PHP extensions

Everyone has been complaining that PHP content is too complicated. In recent years, developers have made corresponding efforts to remove Remove some redundant features in the project. Even so, the number of libraries and other extensions available is impressive. Some developers are even starting to consider implementing their own extensions.

　5. Use PHP accelerator

Under normal circumstances, PHP scripts are compiled and executed by the PHP engine and will be converted into machine language, also called opcodes. If a PHP script gets the same result after compilation over and over again, why not skip the compilation process entirely?

With the PHP accelerator, you can achieve this, which caches the machine code of the compiled PHP script. Allows code to be executed immediately upon request without going through a tedious compilation process.

For PHP developers, there are currently two available caching solutions. One is APC (Alternative PHP Cache, optional PHP cache), which is an open source accelerator that can be installed through PEAR. Another popular solution is Zend Server, which not only provides opcode caching technology, but also provides caching tools for corresponding pages.

　6. Avoid high-cost operations through memory caching

　 PHP usually plays an important role in retrieval and data analysis, and these operations may cause performance degradation. In fact, some operations are completely unnecessary, especially repeatedly retrieving some commonly used static data from the database. Consider using the Memcached extension for short-term caching of data. Memcached's extended cache works with the libMemcached library to cache data in RAM and also allows users to define the cache period, helping to ensure real-time updates of user information.

Original English text: http://www.phpbuilder.com/columns/php-performance-tips/Jason_Gilmore07122011.php3?page=1

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