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]]> By: Matthew Weier O'Phinney http://www.armando.ws/2008/04/zend_loader-humm/comment-page-1/#comment-2084 Matthew Weier O'Phinney Tue, 22 Apr 2008 13:26:52 +0000 http://www.armando.ws/?p=182#comment-2084 The author of Zend_Cache is a big performance zealot, so I'm not surprised to read of that comment. :-) One of our engineers did some benchmarking of Zend_Loader coming into the 1.0.4 and 1.5.0 releases to determine how it stacks up to require_once calls. The results were interesting -- Zend_Loader is typically only a few percentage points slower than using require_once. Currently, within the ZF codebase, we encourage using require_once over Zend_Loader *unless* the class name is being calculated dynamically -- such as with plugins and helpers. This helps with class detection in IDEs as well as with API documentation generation. For applications built on top of ZF, we encourage using autoloading, via Zend_Loader::registerAutoload(). This makes development easier for the developer as they do not need to track their dependencies, and makes the code more readable. Looking forward to 2.0, we will likely move to all autoloading. With the improvements in the 5.2.x PHP series regarding the realpath cache, the differences in performance between autoloading and using require_once are nominal, and the benefits to development of using autoloading are tremendous. The author of Zend_Cache is a big performance zealot, so I’m not surprised to read of that comment. :-)

One of our engineers did some benchmarking of Zend_Loader coming into the 1.0.4 and 1.5.0 releases to determine how it stacks up to require_once calls. The results were interesting — Zend_Loader is typically only a few percentage points slower than using require_once.

Currently, within the ZF codebase, we encourage using require_once over Zend_Loader *unless* the class name is being calculated dynamically — such as with plugins and helpers. This helps with class detection in IDEs as well as with API documentation generation. For applications built on top of ZF, we encourage using autoloading, via Zend_Loader::registerAutoload(). This makes development easier for the developer as they do not need to track their dependencies, and makes the code more readable.

Looking forward to 2.0, we will likely move to all autoloading. With the improvements in the 5.2.x PHP series regarding the realpath cache, the differences in performance between autoloading and using require_once are nominal, and the benefits to development of using autoloading are tremendous.

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