Why should we upgrade to PHP5 platform_PHP tutorial

Because the PHP5 platform includes a new object model, more new features, faster processing speed, especially the speed of processing object-oriented code, although the speed of object-oriented code in PHP 4 The speed is relatively average, but the speed of object-oriented code in PHP5.

[Test environment]

* CPU: Intel Pentium4 2.66GHz

* Memory: 1GB

* Disk: 73GB/ SCSI

* OS: FreeBSD 4.11

* Web: Apache 1.3.37

Test tool: ab (http_load can also be used)

Noun RPS: Requests per second (number of requests per second)

[PHP 4.4.2 test results]

[Function]

Test results: ab The result of -n 10000 -c 50 is 1047.23/rps

[Class Class]

Do not instantiate the class

Test result: ab -n 10000 -c 50 It is 1034.98/rps

Instantial class

Test result: ab -n 10000 -c 50 The result is 1006.14/rps

Inheritance of class

Test results: The result of ab -n 10000 -c 50 is 992.95/rps

[PHP5 platform test results]

[Function]

Test result: ab -n 10000 -c 50 The result is 1176.06/rps

[Class]

Do not instantiate the class

Test result: ab -n 10000 - The result of c 50 is 1197.17/rps

Instance class

Test result: ab -n 10000 -c 50 The result is 1187.93/rps

Inheritance and abstraction of class

Test results: The result of ab -n 10000 -c 50 is 1128.54/rps

[Test results and analysis]

[ Test result data]

Version function test inheritance of non-instantiated class instantiated class

PHP 4.4.2 1047.23/rps 1034.98/rps 1006.14/rps 992.95/rps

PHP 5.2.1 1176.06/rps 1197.17/rps 1187.93/rps 1128.54/rps

[Result Analysis]

1. Overall, It is obvious that the performance of PHP5.2 is slightly higher than that of PHP4.4, so don’t doubt that the performance of PHP5.2 will be worse, it is obviously faster than PHP4

2. Classes in PHP4.4 The parsing performance is obviously slower than that of functions, especially when inheritance is used, it drops sharply, so in PHP4.4 it is more suitable to use process-oriented and non-inherited class operations

3. PHP5 The result in .2 is that the execution speed of classes is faster than functions. It can be seen that the PHP5.2 engine has spent a lot of effort on object-oriented processing. At the same time, whether they are functions or classes, their performance is good

4. Through this test, we have every reason to upgrade PHP4 to the PHP5 platform with little code change, and PHP5 is basically backwards compatible with the PHP4 code, except for some special codes. In addition, it is mentioned above that PHP Group will no longer continue to maintain PHP4 after the end of this year, so upgrade early and have peace of mind.