in reply to
Re^3: Is your Perl running as fast as possible?
in thread Is your Perl running as fast as possible?
not only "debug symbols" that binary will contain, it will also contain code within some #ifdef's; yet some -Oxxx are disabled
Let's RTFS a bit -- following is an excerpt from ./win32/makefile.mk (same for linux build, I guess)
# uncomment next line if you want debug version of perl (big,slow)
# If not enabled, we automatically try to use maximum optimization
# with all compilers that are known to have a working optimizer.
#CFG *= Debug