On 05/26/2015 07:33 AM, Dmitry Stogov wrote: > Commit: 7dac4d449f72d7eb029aa1a8ee87aaf38e17e1c5 > Author: Dmitry Stogov <dmi...@zend.com> Tue, 26 May 2015 17:33:25 > +0300 > Parents: ca31711625095c2d6e308d7f0fc9d371ad0934d4 > Branches: master > > Link: > http://git.php.net/?p=php-src.git;a=commitdiff;h=7dac4d449f72d7eb029aa1a8ee87aaf38e17e1c5 > > Log: > Add targets to simplify building PHP with FDO (Feedback Directed Optimisation) > PHP should be built with the folowing steps: > > make clean > make -j4 prof-gen > ; now php should be trained with some scripts > ; for example `sapi/cgi/php -T 1000 /var/www/http/wordpress/index.php > > /dev/null` > make prof-clean > make -j4 prof-use > > The "properly" trained build may give up to 10% real performance boost! > "Improprly" trained PHP might be even slower.
Whoa, really 10%? I know there is AutoFDO coming in gcc 5.1 and I didn't think this was really practical until then. Perhaps it is. I wonder if this will spur php-wordpress, php-drupal and php-mediawiki tuned builds? -Rasmus
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