Does the PHP _ autoload () method affect performance?

Introduction
 
For php performance problems, the _ autoload () method is the most widely discussed method. Many people have mentioned that this method has a great impact on performance. Some people say that opcode can also affect the _ autoload () method, so I did a test for these two points.
 
In the end, we found that the _ autoload method has little impact on the performance. Some netizens say that the maintenance cost is countless times higher than the performance cost due to the NO _ autoload () (I agree ).
 
Environment
 
PHP: 5.3.9 -- started in fastcgi Mode
Nginx: 1.1.12
Eaccelerator: 0.9.6.1
 
:

 
Startup interface:

EAccelerator (in the php. ini file) Configuration:

File structure: (each Test file is a file with more than 6000 lines of code)



Test: Test with eAccelerator Cache
 
Test code: loaded by _ autoload


 
Figure 1
The refresh results in the browser are as follows:
Total Time: 0.10401391983032
Total Time: 0.10252094268799
Total Time: 0.095267057418823
Total Time: 0.10013008117676
Total Time: 0.096842050552368
Total Time: 0.097998142242432
Total Time: 0.10348510742188
Total Time: 0.096648931503296

Test: Without _ autoload ()

 

Figure 2

Test result-click the browser
Total Time: 0.10309100151062
Total Time: 0.10285210609436
Total Time: 0.10154414176941
Total Time: 0.097845792770386
Total Time: 0.099545001983643
Total Time: 0.10166597366333
 
The final result is that the autoload method does not show significant performance degradation.
 
Test: cancel the eAccelerator cache for testing
 
Test results in Figure 1
Total Time: 0.24992394447327
Total Time: 0.25681900978088
Total Time: 0.25327301025391
Total Time: 0.22580695152283
Total Time: 0.22656512260437
Total Time: 0.22530484199524
Total Time: 0.23080611228943
 
Test results in Figure 2
Total Time: 0.23054909706116
Total Time: 0.22633790969849
Total Time: 0.23442888259888
Total Time: 0.2350070476532
Total Time: 0.22897601127625
Total Time: 0.23207712173462
The _ autoload () method does not significantly affect the performance.

Summary
 
The above two groups of experiments show that:
1 >__ the autoload method has no obvious performance loss. Therefore, do not use the _ autoload method.
2> when opcode is used, php code execution speed is significantly improved by more than twice.
 

From Chuan Shan Jia