The PHP Accelerator 1.2 By Nick Lindridge

Abstract

Introduction !

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PHP Engine Integration ' $ $

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The File Cache and Code Serialisation $

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The Direct Access Shared Memory Cache 2

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Cache Locks and Concurrent Reading/Writing *

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Code Optimisation $ 6

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0 2 ZEND_FETCH_W str='x' fetch local 1 2 ZEND_ASSIGN var* 0 str='inefficient' R1 (unused) 2 3 ZEND_INIT_STRING R2 3 3 ZEND_ADD_STRING tvar T2 Vconst ‘This’ R2 4 3 ZEND_ADD_STRING tvar T2 Vconst ‘ ‘ R2 5 3 ZEND_ADD_STRING tvar T2 Vconst ‘is’ R2 6 3 ZEND_ADD_STRING tvar T2 Vconst ‘ ‘ R2 7 3 ZEND_ADD_STRING tvar T2 Vconst ‘rather’ R2 8 3 ZEND_ADD_STRING tvar T2 Vconst ‘ ‘ R2 9 3 ZEND_FETCH_R str='x' fetch local R3 10 3 ZEND_ADD_VAR T2 var* 3 R2 11 3 ZEND_ADD_STRING tvar T2 Vconst ‘ ‘ R2 12 3 ZEND_ADD_STRING tvar T2 Vconst ‘code’ R2 13 3 ZEND_ADD_CHAR ‘\n’ R2 14 3 ZEND_ECHO T2 15 5 ZEND_RETURN val=1

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ZEND_FETCH_W str='x' fetch local ZEND_ASSIGN var* 0 str='inefficient' R3 ZEND_INIT_STRING R2 ZEND_ADD_STRING tvar T2 Vconst ‘This is rather ‘ R2 ZEND_ADD_VAR T2 var* 3 R2 ZEND_ADD_STRING tvar T2 Vconst ‘ code\n’ R2 ZEND_ECHO T2 ZEND_RETURN val=1

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Performance Gains $

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Summary $ 5

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The PHP Accelerator 1.2

Page 1 ... presents an overview of the PHPA design, and how PHPA integrates with ... Before executing a PHP script, the PHP engine1 first reads, parses, and ...

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