PHP Performance : Copy vs. Reference

Question

Hey there. Today I wrote a small benchmark script to compare performance of copying variables vs. creating references to them. I was expecting, that creating references to l

Answer 1

1. In recursiveReference() function you call recursiveCopy() function. It it what you really intended to do?
2. You do nothing with $foo variable - probably it was supposed to be used in further method call?
3. Passing variable by reference should generally save stack memory in case of passing large objects.