I haven't heard of that before... Is it some sort of compiler optimization
setting? Could you recommend to me some reference that would describe how
this can be done? It might help a lot.

http://gcc.gnu.org/onlinedocs/gcc/Other-Builtins.html
look for __builtin_expect.
See also EXPECTED and UNEXPECTED in zend_alloc.c
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Stanislav Malyshev, Zend Software Architect
[EMAIL PROTECTED]   http://www.zend.com/
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