zend_shared_memdup_size   30 ext/opcache/zend_persist_calc.c #define ADD_DUP_SIZE(m,s)  memory_used += zend_shared_memdup_size((void*)m, s)
zend_shared_memdup_size  128 ext/opcache/zend_shared_alloc.h int  zend_shared_memdup_size(void *p, size_t size);