Dmitry Stogov php5.4 Benchmark Results.

PHP performance [sec]
---------------------
5.3 5.4 speedup
bench.php 3.21 2.56 20%
micro_bench.php 23.15 11.23 50%

PHP + Zend OptimizerPlus performance [req/sec]
----------------------------------------------
5.3 5.4 speedup
blog 62.8 71.0 13%
drupal 1074.3 1146.7 7%
zend framework 102.9 124.6 21%
hello 5955.4 7826.5 31%
qdig 267.6 280.4 5%
typo3 357.0 405.6 14%
wordpress 119.8 130.8 9%
xoops 78.4 93.0 19%
scrum 96.3 117.4 22%

PHP/O+ memory usage (memory_get_peak_usage) [KB]
------------------------------------------------
5.3 5.4 improvement
blog 1280 768 40%
drupal 512 256 50%
zend framework 7680 5888 23%
hello 512 256 50%
qdig 768 512 33%
typo3 1536 1024 33%
xoops 1536 1280 17%
scrum 1792 1280 19%