Introduced immutable arrays. They don't need to be copyed and may be used directly from SHM.

Use new zend_hash API

Don't use cast (compiler friendly)

Fixed apply_func_args_t

Fixed apply_func_arg_t, and it's better not using cast (compiler friendly)

Use optimized zend_array_dup() function. convert zend_hash_num_elements() and zend_hash_next_free_element() into macros.

Re-applyed Bob's patch with minor fixes

Reverted Bob's patch (it breaks many tests when run with opcache and needs to be fixed first).

Re-added fix for bug #66015 and adapted for phpng branch

Fix argument, cur_method_ref->class_name is a zend_string

zend_stack_top() now returns pointer directly

Don't allocate zend_stack elements individually

Instead allocate a vector of elements. Size must now be specified
on initialization rather than on push.

Split IS_BOOL into IS_FALSE and IS_TRUE

Use symbolic names instead of magic constants + optimization

Initialize hash as unpacked if it contains string keys

Pass expected array size hint in INIT_ARRAY

To avoid unnecessary rehashes

Fixed compilaation warnings

Use zval_get_string in a few more places

Combine HashTable.flags and HashTable.nApplyCount into single 32-bit word

Use ZEND_FETCH_FOREACH_* macros to iterate over HashTables instead of zend_hash_move_forward() and family.

Moved zend_literal->cache_slot right into zval.
It should be accessed using Z_CACHE_SLOT() macro.
zend_literal structure is removed.
API functions that accepted pointer to zend_literal no

Moved zend_literal->cache_slot right into zval.
It should be accessed using Z_CACHE_SLOT() macro.
zend_literal structure is removed.
API functions that accepted pointer to zend_literal now accept pointer to zval or cache_slot directly.
Calls of such functiond that now accept cache_slot need to be changed to pass -1 instead of NULL.

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Don't copy in ZEND_CAST if type is already correct

Cleanup (1-st round)

Fixed memory leak

Fixed interface constants inheritance.
Now we use IS_REFERENCE for inhereted class constants.
I might miss some edje cases.