Loop optimization

Remove unused Git attributes ident

The $Id$ keywords were used in Subversion where they can be substituted
with filename, last revision number change, last changed date, and last
use

Remove unused Git attributes ident

The $Id$ keywords were used in Subversion where they can be substituted
with filename, last revision number change, last changed date, and last
user who changed it.

In Git this functionality is different and can be done with Git attribute
ident. These need to be defined manually for each file in the
.gitattributes file and are afterwards replaced with 40-character
hexadecimal blob object name which is based only on the particular file
contents.

This patch simplifies handling of $Id$ keywords by removing them since
they are not used anymore.

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API cleanup.
Removed useless filename and lineno arguments, used in DEBUG build.
The patch doesn't break source compatibility of public API (only binary compatibility).

Improved "Fast Shutdown".

Removed "dead" code (zend_hash_update() never fails)

Optimize zend_new_array() for special case, when size <= HT_MIN_SIZE

Replace unused generic zend_hash_*add_or_update() functions by compact implmentations.

_zend_hash_index_add_or_update_i() optimization

Use zend_string_release_ex() instread of zend_string_release() in places, where we sure about string persistence.

Cleanup

Optimize zend_hash_find() for the most usual case

Changed worst HashTable load factor from 1.0 to 0.5

Prefer reloading key->h

Optimize zend_hash_real_init()

Fixed a behavior break introduced by d7f2dc4ec651628e10213625db6aee3559e214a9

Improve HashTable iterators handling:
- Avoid iterators check/update on each HashTable update opration
- Keep position equal (or above) nNumUsed instead of HT_INVALID_IDX
- Fixed iterator

Improve HashTable iterators handling:
- Avoid iterators check/update on each HashTable update opration
- Keep position equal (or above) nNumUsed instead of HT_INVALID_IDX
- Fixed iterators handling in array_unshift()

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Micro optimization

Micro optimization

Merge branch 'PHP-7.2'

* PHP-7.2:
Don't keep HashTable.pDestructor in SHM and always set it into ZVAL_PTR_DTOR in zval_array_dup(). Keeping pointer to a function in SHM is not safe bec

Merge branch 'PHP-7.2'

* PHP-7.2:
Don't keep HashTable.pDestructor in SHM and always set it into ZVAL_PTR_DTOR in zval_array_dup(). Keeping pointer to a function in SHM is not safe because of ASLR.

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Merge branch 'PHP-7.1' into PHP-7.2

* PHP-7.1:
Don't keep HashTable.pDestructor in SHM and always set it into ZVAL_PTR_DTOR in zval_array_dup(). Keeping pointer to a function in SHM is

Merge branch 'PHP-7.1' into PHP-7.2

* PHP-7.1:
Don't keep HashTable.pDestructor in SHM and always set it into ZVAL_PTR_DTOR in zval_array_dup(). Keeping pointer to a function in SHM is not safe because of ASLR.

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Don't keep HashTable.pDestructor in SHM and always set it into ZVAL_PTR_DTOR in zval_array_dup().
Keeping pointer to a function in SHM is not safe because of ASLR.

Completely hide GC implementation details into zend_gc.c

Micro optimization

Merge HashTable.u.v.consistency into HashTable.u.v.flags

Use HT_FLAGS() macro