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PHP Performance Optimization Techniques
1.
PHP Performances De
Cock Xavier
2.
3.
4.
5.
6.
Extensions providing functionalities
7.
8.
Source code compilation
to Opcode
9.
Opcode Handling
10.
Memory management
11.
12.
13.
Automatic type conversion
14.
Automatic garbage collection
when ref_count is 0
15.
As of PHP
5.3 Cyclic garbage collector
16.
Zval Examples <?php
$a = 41 ; /* Context ("a" => Zval_1); * Zval_1 {ref_count:1, value:41, type:LONG}; */ $b = $a ; /* Context ("a" => Zval_1, "b" => Zval_1); * Zval_1 {ref_count:2, value:41, type:LONG}; */ $b ++ ; /* Context ("a"=> Zval_1, "b" => Zval_2); * Zval_1 {ref_count:1, value:41, type:LONG}; * Zval_2 {ref_count:1, value:42, type:LONG}; */ $b .= ", The answer ..." ; /* Context ("a"=> Zval_1, "b" => Zval_3); * Zval_1 {ref_count:1, value:41, type:LONG}; * Zval_2 {ref_count:0, value:42, type:LONG}; // Freed * Zval_3 {ref_count:1, value:"42, The answer ...", type:STRING}; */
17.
18.
19.
20.
Op1
21.
Op2
22.
Metas (line n°,
handler, result, ...)
23.
Opcode examples <?php
echo "Hello", " ", "World"; filename: /home/xavier/- function name: (null) number of ops: 5 compiled vars: none line # op operands --------------------------------------------- 2 0 ECHO OP1[ 'Hello' ] 1 ECHO OP1[ ' ' ] 2 ECHO OP1[ 'World' ] 4 3 RETURN OP1[ 1 ] 4* ZEND_HANDLE_EXCEPTION
24.
Opcode examples <?php
echo "Hello"." "."World"; filename: /home/xavier/- function name: (null) number of ops: 5 compiled vars: none line # op return operands --------------------------------------- 2 0 CONCAT RES[ ~0 ] OP1[ 'Hello' ] OP2[ '+' ] 1 CONCAT RES[ ~1 ] OP1[ ~0 ] OP2[ 'World' ] 2 ECHO OP1[ ~1 ] 3 3 RETURN OP1[ 1 ] 4* ZEND_HANDLE_EXCEPTION
25.
26.
Arrays
27.
Object Properties
28.
Ini Directives, included
Files
29.
Classes, Functions, Constants
30.
31.
32.
33.
34.
Break them before
unset
35.
36.
SwiftMailer Examples Implementation
1 foreach ( unpack ('C*' , $bytes ) as $byte ) // Convert String to int array { $this -> _array [] = pack ('C' , $byte ); // Function Call in tight loop } filename: /home/xavier/Bureau/php-5.3.1/ext/- function name: (null) number of ops: 17 compiled vars: !0 = $bytes, !1 = $byte line # op return operands ----------------------------------------------- 2 0 SEND_VAL OP1[ 'C*' ] 1 SEND_VAR OP1[ !0 ] 2 DO_FCALL OP1[ 'unpack' ] 3 FE_RESET RES[ $1 ] OP1[ $0 ] OP2[ ->14 ] 4 FE_FETCH RES[ $2 ] OP1[ $1 ] OP2[ ->14 ] 5 ZEND_OP_DATA RES[ UNUSED ] OP1[ UNUSED ] OP2[ UNUSED ] 6 ASSIGN OP1[ !1 ] OP2[ $2 ] 4 7 SEND_VAL OP1[ 'C' ] 8 SEND_VAR OP1[ !1 ] 9 DO_FCALL OP1[ 'pack' ] 10 FETCH_OBJ_W RES[ $4 ] OP1[ UNUSED ] OP2[ '_array' ] 11 ZEND_ASSIGN_DIM OP1[ $4 ] OP2[ UNUSED ] 12 ZEND_OP_DATA RES[ UNUSED ] OP1[ $6 ] OP2[ $7 ] 5 13 JMP OP1[ ->4 ] 14 SWITCH_FREE RES[ UNUSED ] OP1[ $1 ] 6 15 RETURN OP1[ 1 ] 16* ZEND_HANDLE_EXCEPTION
37.
SwiftMailer Examples Implementation
2 $to_add = str_split ( $bytes ); // Convert string to char array /* add the array as first arg of the function */ array_unshift ( $to_add , & $this -> _array ); // Will trigger E_STRICT /* Push all elements in one function call and get the count */ $this -> _arraySize = call_user_func_array ('array_push' , $to_add ); compiled vars: !0 = $to_add, !1 = $bytes line # op return operands -------------------------------------------------------------------------- 2 0 SEND_VAR OP1[ !1 ] 1 DO_FCALL OP1[ 'str_split' ] 2 ASSIGN OP1[ !0 ] OP2[ $0 ] 4 3 SEND_REF RES[ UNUSED ] OP1[ !0 ] OP2[ UNUSED ] 4 FETCH_OBJ_W RES[ $2 ] OP1[ UNUSED ] OP2[ '_array' ] 5 SEND_REF RES[ UNUSED ] OP1[ $2 ] OP2[ UNUSED ] 6 DO_FCALL OP1[ 'array_unshift' ] 6 7 SEND_VAL OP1[ 'array_push' ] 8 SEND_VAR OP1[ !0 ] 9 DO_FCALL OP1[ 'call_user_func_array' ] 10 ZEND_ASSIGN_OBJ OP1[ UNUSED ] OP2[ '_arraySize' ] 11 ZEND_OP_DATA RES[ UNUSED ] OP1[ $5 ] OP2[ UNUSED ] 7 12 RETURN OP1[ 1 ] 13* ZEND_HANDLE_EXCEPTION
38.
SwiftMailer Examples Implementation
3 $to_add = str_split ( $bytes ); // Convert string to char array /* Calls array Merge */ /* Array merge works by copying the first array element By element, then the second, third, … The speed decreases with the number of items in each array */ $this -> _array = array_merge ( $this -> _array , $to_add ); $this -> _arraySize = count ( $this -> _array ); compiled vars: !0 = $to_add, !1 = $bytes line # op return operands ------------------------------------------------------------------------------- 2 0 SEND_VAR OP1[ !1 ] 1 DO_FCALL OP1[ 'str_split' ] 2 ASSIGN OP1[ !0 ] OP2[ $0 ] 7 3 FETCH_OBJ_R RES[ $3 ] OP1[ UNUSED ] OP2[ '_array' ] 4 SEND_VAR OP1[ $3 ] 5 SEND_VAR OP1[ !0 ] 6 DO_FCALL OP1[ 'array_merge' ] 7 ZEND_ASSIGN_OBJ OP1[ UNUSED ] OP2[ '_array' ] 8 ZEND_OP_DATA RES[ UNUSED ] OP1[ $4 ] OP2[ UNUSED ] 8 9 FETCH_OBJ_R RES[ $6 ] OP1[ UNUSED ] OP2[ '_array' ] 10 SEND_VAR OP1[ $6 ] 11 DO_FCALL OP1[ 'count' ] 12 ZEND_ASSIGN_OBJ OP1[ UNUSED ] OP2[ '_arraySize' ] 13 ZEND_OP_DATA RES[ UNUSED ] OP1[ $7 ] OP2[ UNUSED ] 10 14 RETURN OP1[ 1 ] 15* ZEND_HANDLE_EXCEPTION
39.
SwiftMailer Examples Implementation
4 $to_add = str_split ( $bytes ); foreach ( $to_add as $value ) { $this -> _array [] = $value ; } $this -> _arraySize = count ( $this -> _array ); compiled vars: !0 = $to_add, !1 = $bytes, !2 = $value line # op return operands -------------------------------------------------------------------------- 1 0 SEND_VAR OP1[ !1 ] 1 DO_FCALL OP1[ 'str_split' ] 2 ASSIGN OP1[ !0 ] OP2[ $0 ] 2 3 FE_RESET RES[ $2 ] OP1[ !0 ] OP2[ ->11 ] 4 FE_FETCH RES[ $3 ] OP1[ $2 ] OP2[ ->11 ] 5 ZEND_OP_DATA RES[ UNUSED ] OP1[ UNUSED ] OP2[ UNUSED ] 6 ASSIGN OP1[ !2 ] OP2[ $3 ] 3 7 FETCH_OBJ_W RES[ $5 ] OP1[ UNUSED ] OP2[ '_array' ] 8 ZEND_ASSIGN_DIM OP1[ $5 ] OP2[ UNUSED ] 9 ZEND_OP_DATA RES[ UNUSED ] OP1[ !2 ] OP2[ $7 ] 4 10 JMP OP1[ ->4 ] 11 SWITCH_FREE RES[ UNUSED ] OP1[ $2 ] 5 12 FETCH_OBJ_R RES[ $9 ] OP1[ UNUSED ] OP2[ '_array' ] 13 SEND_VAR OP1[ $9 ] 14 DO_FCALL OP1[ 'count' ] 15 ZEND_ASSIGN_OBJ OP1[ UNUSED ] OP2[ '_arraySize' ] 16 ZEND_OP_DATA RES[ UNUSED ] OP1[ $10 ] OP2[ UNUSED ] 6 17 RETURN OP1[ 1 ] 18* ZEND_HANDLE_EXCEPTION
40.
41.
42.
Xdebug / Zend
Debug – Profilers
43.
44.
Use Opcode Caching
: APC, eAccelerator, XCache, Zend Server, …
45.
Use data Caching
: Memcached, …
46.
Optimize your SQL
47.
Access your data
by batches
48.
Create PHP Extension
49.
Use other implementations
: Facebook's HipHop, phc, Quercus, RoadSend PHP
50.
Questions? Thanks for
listening
Download now