Re: New Memory Manager

On Tue, Jan 14, 2014 at 3:21 PM, Dmitry Stogov <dmitry@zend.com> wrote: > Hi, > > Recently I took a look into jemalloc and tcmalloc internals and tried to > borrow some ideas. You may check the result at > https://github.com/dstogov/php-src/tree/xx_malloc. It's a > dirty prove of > concept implementation of New Memory Manager for PHP. It was tested only on > Linux, release, non-ZTS build. It misses support for debug mode and ZTS > yet. The main advantage is small but consistent speed improvement on > real-life applications. > > I would appreciate if you bench it vs vanilla PHP-5.6 on your applications, > review the code from performance and security points of views, and come > with comments, ideas and criticism. (For example: may be someone would > suggest how to avoid check for USE_ZEND_ALLOC=0 to allow system malloc() > usage on each emalloc() call? How to reduce cost of statistics collection?) > > Currently, I'm not sure if 5% speed improvements costs the effort. > > The results of my benchmarks follow. > > Thanks. Dmitry. > > *PHP-5.6 32-bit* zend_alloc xx_malloc Improvement blog 105.6 109.7 > 3.88% drupal > 1625.0 1667.6 2.62% fw 231.6 286.4 23.66% hello 12048.4 11865.9 -1.51% qdig > 464.4 495.3 6.65% typo3 563.8 584.9 3.74% wordpress 188.9 196.8 4.19% xoops > 132.7 140.0 5.50% scrum 181.6 192.7 6.11% ZF1 Hello 1153.2 1228.4 6.52% ZF2 > Test 263.0 275.5 4.75% Great Dmitry ! We worked on something with Joe few months ago, mainly adding a new ZendMM handler which binds jemalloc(). Anyway, I'm gonna try your code and run it against several Symfony2 applications. I come back to you end of week with some results ;-) Julien