Re: About optimization

From:	Sebastian Bergmann	Date:	Wed, 13 Jan 2010 11:33:44 +0000
Subject:	Re: About optimization
References:	1	Groups:	php.internals
Request:	Send a blank email to internals+get-46680@lists.php.net to get a copy of this message

Am 13.01.2010 12:18, schrieb mathieu.suen:
> I would like to know why the opcode is not optimized.

 Because any optimization, even very simple ones, impose a performance
 penalty in the default execution model of PHP which does not use a
 bytecode cache.

 Only when the bytecode is not regenerated for each execution does it
 make sense to invest for time for the then one-time compilation.

-- 
Sebastian Bergmann                    Co-Founder and Principal Consultant
http://sebastian-bergmann.de/                          
http://thePHP.cc/



   

Thread (42 messages)

• mathieu.suenWed, 13 Jan 2010 11:18:05 +0000
  • Sebastian BergmannWed, 13 Jan 2010 11:33:44 +0000
    • mathieu.suenWed, 13 Jan 2010 12:40:32 +0000
      • Dave IngramWed, 13 Jan 2010 13:51:22 +0000
        • Graham KellyWed, 13 Jan 2010 15:25:01 +0000
          • Alain WilliamsWed, 13 Jan 2010 15:31:13 +0000
            • Rasmus LerdorfWed, 13 Jan 2010 15:48:17 +0000
              • Alain WilliamsWed, 13 Jan 2010 16:55:33 +0000
                • Rasmus LerdorfWed, 13 Jan 2010 17:01:26 +0000
              • Karsten DambekalnsWed, 27 Jan 2010 12:22:28 +0000
                • Rasmus LerdorfWed, 27 Jan 2010 16:28:17 +0000
                  • Stan VassilevSun, 31 Jan 2010 06:30:07 +0000
          • Tim StarlingWed, 13 Jan 2010 16:08:58 +0000
            • Rasmus LerdorfWed, 13 Jan 2010 16:59:10 +0000
              • Tim StarlingWed, 13 Jan 2010 23:37:39 +0000
                • Stanislav MalyshevWed, 13 Jan 2010 23:55:07 +0000
                  • Stanislav MalyshevThu, 14 Jan 2010 00:26:07 +0000
                    • Derick RethansThu, 14 Jan 2010 00:30:11 +0000
                    • Rasmus LerdorfThu, 14 Jan 2010 00:36:26 +0000
                  • Tim StarlingThu, 14 Jan 2010 00:57:09 +0000
                    • Rasmus LerdorfThu, 14 Jan 2010 01:02:56 +0000
                    • Rasmus LerdorfThu, 14 Jan 2010 01:44:19 +0000
                      • Andrey HristovThu, 14 Jan 2010 11:48:18 +0000
                    • Stanislav MalyshevThu, 14 Jan 2010 01:55:50 +0000
                      • Tim StarlingThu, 14 Jan 2010 03:18:45 +0000
                        • Rasmus LerdorfThu, 14 Jan 2010 03:27:59 +0000
                        • Stanislav MalyshevThu, 14 Jan 2010 23:09:18 +0000
                        • Andi GutmansFri, 15 Jan 2010 03:25:30 +0000RE: [PHP-DEV] About optimization
                • Rasmus LerdorfThu, 14 Jan 2010 00:05:23 +0000
            • Stanislav MalyshevWed, 13 Jan 2010 23:48:12 +0000
            • Derick RethansThu, 14 Jan 2010 00:07:58 +0000