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One of the advantages of PHP is that it is fast. it is enough for general website applications. However, if the site's traffic is high, bandwidth is narrow, or other factors cause a performance bottleneck on the server, you may have to think of other ways to further speed up PHP. This article will introduce how to do this in several ways, so that users can browse PHP quickly. it is enough for general website applications. However, if the site's traffic is high, bandwidth is narrow, or other factors cause a performance bottleneck on the server, you may have to think of other ways to further speed up PHP. This article will introduce how to achieve this in several aspects, so that users can be more comfortable browsing ".

Code Optimization


I don't want to tell you again here
I think everyone knows how to write cleaner code. when you need speed, you may have done a lot of work on optimizing the PHP source code, what we have mentioned here is that this tedious work can be done by other tools. This is Zend Optimizer, which is available for free from Zend Technologies's website (http://www.zend.com. Its principle is very simple. it detects intermediate code generated by the Zend Engine and optimizes it to get a higher execution speed. I think code optimization is a cumbersome task, and the optimized code may become hard to understand, especially when you put down the PHP program for a while, suddenly, when the customer asks you to make some changes, you may not understand it yourself ;-). Therefore, I suggest you use Zend Optimizer to optimize PHP when the source code is complex. the advantage is that it will not make your code complex and difficult to understand.

Installing Zend Optimizer is very simple. Download the relevant pre-compiled libraries based on your platform, and add two lines in your php. ini to restart your web server!

Zend_optimizer.optimization_level = 15zend_extension = "/path/to/ZendOptimizer. so" zend_loader.enable = Off

You may be a bit strange. isn't it just two rows? how is it changed to three rows. However, the third line is optional. it seems that disabling this zend_loader will speed up optimization, so you may wish to add this line to your php. ini file. Note that zend_loader can be disabled only when you do not use Zend Encoder Runtime. Zend Encoder Runtime is also mentioned below.

Is it faster? Use cache (buffer)

If your PHP application requires a higher speed, the next method is buffering. There are several different ways to achieve this. I have tried Zend Cache (evaluation version), APC, and Afterburner Cache myself.

All of the above are "buffer modules ". They all work in the same way. when the PHP file is requested for the first time, the intermediate code of your PHP source code is stored in the memory of the web server. for the same requests in the future, both provide the "compile" version in the memory. Since it can minimize disk access, this method can indeed greatly improve PHP performance. More conveniently, when your PHP source code is modified, the buffered module can detect these changes and reload them the same, so you don't have to worry that the customer will get an old version of the program. These buffer modules are really good, but which one should I choose? The following sections describe:

Zend Cache is a commercial product of Zend Technologies (it is also a free company that provides us with the PHP engine and Zend Optimizer ). It is really good. After the first run, you can obviously notice that the PHP speed has been greatly improved, and there are more idle resources on the server. The disadvantage is that you have to pay for it, but it is very worthwhile for cost effectiveness.

Afterburner Cache is a free buffer module provided by Bware Technologies (bwcache. bware. it. The current version is only a beta version. the work it does seems to be similar to Zend Cache, but the performance improvement is not as good as Zend Cache, and the existing version cannot work with Zend Optimizer, but it is free.

APC (Alternative PHP Cache) is another free module provided by Community Connect (apc.communityconnect.com. It works very stably and has a lot of speed improvement. Please note that I have not found an official test data. these are just tests on my application, therefore, we cannot draw a conclusion.

Edit responsibility: xintc110