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Date: Tue, 14 Jan 2014 18:21:52 +0400
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Subject: New Memory Manager
From: dmitry@zend.com (Dmitry Stogov)

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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%







 *PHP-5.6 64-bit* zend_alloc xx_malloc Improvement  blog 99.0 102.3
3.33%  drupal
1531.1 1604.2 4.78%  fw 197.6 206.5 4.50%  hello 11702.0 11875.2 1.48%  qdig
451.1 476.8 5.70%  typo3 541.8 568.7 4.96%  wordpress 176.5 185.8 5.27%  xoops
126.1 134.5 6.66%  scrum 169.3 174.9 3.31%  ZF1 Hello 1042.9 1119.6 7.35%  ZF2
Test 238.4 242.5 1.72%

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