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PHP Performance SfLive 2010
- 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}; */
- 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
- 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