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1.1     ! misho       1: Zend Memory Manager
        !             2: ===================
        !             3: 
        !             4: General:
        !             5: --------
        !             6: 
        !             7: The goal of the new memory manager (available since PHP 5.2) is to reduce memory
        !             8: allocation overhead and speedup memory management.
        !             9: 
        !            10: The new manager's "configure" has no "--disable-zend-memory-manager" option,
        !            11: but it has "--enable-malloc-mm" instead.  It is enabled by default in DEBUG
        !            12: build and disabled by default in RELEASE build.  when enabled it allows selecting
        !            13: between malloc and emalloc at runtime so you can use internal and external memory
        !            14: debuggers without recompilation.
        !            15: 
        !            16: Debugging:
        !            17: ----------
        !            18: 
        !            19: Normal:
        !            20: 
        !            21:     $ sapi/cli/php -r 'leak();'
        !            22: 
        !            23: Zend MM disabled:
        !            24: 
        !            25:     $ USE_ZEND_ALLOC=0 valgrind --leak-check=full sapi/cli/php -r 'leak();'
        !            26: 
        !            27: Tweaking:
        !            28: ---------
        !            29: 
        !            30: The Zend MM can be tweaked using ZEND_MM_MEM_TYPE and ZEND_MM_SEG_SIZE environment
        !            31: variables.  Default values are "malloc" and "256K". Dependent on target system you
        !            32: can also use "mmap_anon", "mmap_zero" and "win32" storage managers.
        !            33: 
        !            34:        $ ZEND_MM_MEM_TYPE=mmap_anon ZEND_MM_SEG_SIZE=1M sapi/cli/php ..etc.