Performance is meaningless if your VM can't run people's code.
Not sure how many of those they are actually passing though. https://github.com/hippyvm/hippyvm/tree/master/test_phpt/Zen...
Technical side-note: /Zend there appears to be just the tests for the Zend engine (i.e. from PHP's /Zend/tests), while the containing directory contains test folders copied from other parts of PHP (like the standard library)
Overview of PHP_5_5
Build Status: OK
Last Build Time: 2 days
Compile Warnings: 611
Code Coverage: 0.3%
Test Failures: 78
Expected Test Failures: 42
Valgrind Reports: 44
The "Expected Test Failures" is fascinating.
We working hard to be as close to Zend as possible, though we are not there yet. You can try "translate" and run HippyVM against php-src suite.
"Basic" PHP compatibility was achieved which means that most of the syntax and stdlib from recent PHP is there. What we are doing right now is implementing modules (phar, fcgi, ...)