Optimization when extensions don't provide handlers

Hi

I have seen that the php-src uses some flags
like ZEND_EXTENSIONS_HAVE_OP_ARRAY_HANDLER to optimise the code so that the
loop that calls the op array handler is not called if no extension has set
up an op array handler

I wonder why this has not been done for
the statement_handler, fcall_begin_handler and fcall_end_handler. This
could be used to provide an optimised execution when no extension sets up a
handler for these extension points

Interested to know if there is a technical reason for this

Cheers

Carlos

OK, I reply to myself. I can see that these handlers are only called if the
corresponding opcodes are compiled and these are only compiled
if ZEND_COMPILE_EXTENDED_STMT or ZEND_COMPILE_EXTENDED_FCALL are set. So
an extension that does not set these handlers would not set these compiler
flags, then there is no need to do any more optimization :-)