Avoid unnecessary duplication

Reduced VM code size.
Made FETCH_DIM/OBJ_FUNC_ARG to dispatch ro corresponding FETCH_DIM/OBJ_R/_W handlers.
Merged TMP and VAR specializations of ZEND_FETCH_OBJ_R.
Allowed dispatching to

Reduced VM code size.
Made FETCH_DIM/OBJ_FUNC_ARG to dispatch ro corresponding FETCH_DIM/OBJ_R/_W handlers.
Merged TMP and VAR specializations of ZEND_FETCH_OBJ_R.
Allowed dispatching to less specialized handelrs and helpers. (e.g. from OP_TMP_CONST to OP_TMPVAR_CONST).

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Optimization of init_func_execute_data()

Removed useless LOAD_OPLINE()

Use zend_string_equal*() API for zend_string equality check instead of direct memcmp() usage.

CONCAT/FAST_CONCAT micro-optimization

Fix ZEND_VM_SPEC=0 build

Introduced zend_hash_find_ex() that may avoid unnecessary hash value check.

TYPE_CHECK instruction changed. Now it keeps in extended_value a type mask.
This makes check for "boolean" cheaper and allows check combination e.g. (is_string($a) || is_null($a))

Don't mix TYPE and TYPE_INFO

Delayed unlikely checks for uninitialized variables

Fix segfault in token_get_all_variation19.phpt

Use cheaper checks

Avoid unnecessary reference-counting on strings.

Removed "_" from API functions.

Fixed #74862: Unable to clone instance when private __clone defined

Even though __clone was implemented as private and called only from
parent class, child extending class instance could

Fixed #74862: Unable to clone instance when private __clone defined

Even though __clone was implemented as private and called only from
parent class, child extending class instance could not be cloned.

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RC manipulation cleanup 2

RC manipulation cleanup

Prevent reference-counting on persistent zvals (internal constants, default properties and constants of internal classes).
New macro ZVAL_COPY_OR_DUP() is used perform duplication, if necessary.

Prevent reference-counting on persistent zvals (internal constants, default properties and constants of internal classes).
New macro ZVAL_COPY_OR_DUP() is used perform duplication, if necessary.
This should eliminate related race-coditions in ZTS build and prevent reference-counting bugs after unclean shutdown.

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Encapsulate reference-counting primitives.
Prohibit direct update of GC_REFCOUNT(), GC_SET_REFCOUNT(), GC_ADDREF() and GC_DELREF() shoukf be instead.
Added mactros to validate reference-count

Encapsulate reference-counting primitives.
Prohibit direct update of GC_REFCOUNT(), GC_SET_REFCOUNT(), GC_ADDREF() and GC_DELREF() shoukf be instead.
Added mactros to validate reference-counting (disabled for now).
These macros are going to be used to eliminate race-condintions during reference-counting on data shared between threads.

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Removed useless reallocations

Fixed signed/unsigned comparisons

Avoid HashTable allocations for empty arrays (using zend_empty_array).

Made run_time_cache to keep "offset" to dynamic properties Buckets (instead of index).

Use run-time cache to keep position of dynamic properties in HashTable to access them without hash lookup.