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This is a new transparent technology that eliminates overhead of PHP class inheritance.
PHP classes are compiled and cached (by opcahce) separately, however their "linking" was done at run-time - on each request. The process of "linking" may involve a number of compatibility checks and borrowing methods/properties/constants form parent and traits. This takes significant time, but the result is the same on each request.
Inheritance Cache performs "linking" for unique set of all the depending classes (parent, interfaces, traits, property types, method types involved into compatibility checks) once and stores result in opcache shared memory. As a part of the this patch, I removed limitations for immutable classes (unresolved constants, typed properties and covariant type checks). So now all classes stored in opcache are "immutable". They may be lazily loaded into process memory, if necessary, but this usually occurs just once (on first linking).
The patch shows 8% improvement on Symphony "Hello World" app.
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Adding an offset to the NULL pointer is undefined behavior.
Avoid this by performing arithmetic on uintptr_t instead.
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This patch removes the so called local variables defined per
file basis for certain editors to properly show tab width, and
similar settings. These are mainly used by Vim and Emacs editors
yet with recent changes the once working definitions don't work
anymore in Vim without custom plugins or additional configuration.
Neither are these settings synced across the PHP code base.
A simpler and better approach is EditorConfig and fixing code
using some code style fixing tools in the future instead.
This patch also removes the so called modelines for Vim. Modelines
allow Vim editor specifically to set some editor configuration such as
syntax highlighting, indentation style and tab width to be set in the
first line or the last 5 lines per file basis. Since the php test
files have syntax highlighting already set in most editors properly and
EditorConfig takes care of the indentation settings, this patch removes
these as well for the Vim 6.0 and newer versions.
With the removal of local variables for certain editors such as
Emacs and Vim, the footer is also probably not needed anymore when
creating extensions using ext_skel.php script.
Additionally, Vim modelines for setting php syntax and some editor
settings has been removed from some *.phpt files. All these are
mostly not relevant for phpt files neither work properly in the
middle of the file.
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Squashed commit of the following:
commit cd0c36c3f943849e5b97a8dbe2dd029fbeab3df9
Merge: 4740dabb84 ad6738e886
Author: Dmitry Stogov <dmitry@zend.com>
Date: Wed Oct 17 14:43:38 2018 +0300
Merge branch 'master' into immutable
* master:
Remove the "auto" encoding
Fixed bug #77025
Add vtbls for EUC-TW encoding
commit 4740dabb843c6d4f7f866b4a2456073c9eaf4c77
Author: Dmitry Stogov <dmitry@zend.com>
Date: Wed Oct 17 14:12:28 2018 +0300
Reverted back ce->iterator_funcs_ptr. Initialize ce->iterator_funcs_ptr fields in immutable classes.
commit ad7a78b253be970db70c2251e66f9297d8e7f829
Author: Dmitry Stogov <dmitry@zend.com>
Date: Wed Oct 17 11:46:30 2018 +0300
Added comment
commit 0276ea51875bab37be01a4dc5e5a047c5698c571
Author: Dmitry Stogov <dmitry@zend.com>
Date: Wed Oct 17 11:42:43 2018 +0300
Added type cast
commit c63fc5d5f19c58498108d1698055b2b442227eb3
Author: Dmitry Stogov <dmitry@zend.com>
Date: Wed Oct 17 11:36:51 2018 +0300
Moved static class members initialization into the proper place.
commit b945548e9306b1826c881918858b5e5aa3eb3002
Author: Dmitry Stogov <dmitry@zend.com>
Date: Wed Oct 17 11:21:03 2018 +0300
Removed redundand assertion
commit d5a41088401814c829847db212488f8aae39bcd2
Author: Dmitry Stogov <dmitry@zend.com>
Date: Wed Oct 17 11:19:13 2018 +0300
Removed duplicate code
commit 8dadca8864e66de70a24bdf1181bcf7dd8fb27d7
Author: Dmitry Stogov <dmitry@zend.com>
Date: Wed Oct 17 11:05:43 2018 +0300
Hide offset encoding magic in ZEND_MAP_PTR_IS_OFFSET(), ZEND_MAP_PTR_OFFSET2PTR() and ZEND_MAP_PTR_PTR2OFFSET() macros.
commit 9ef07c88bd76801e2d4fbfeab3ebfd6e6a67ac5f
Author: Dmitry Stogov <dmitry@zend.com>
Date: Wed Oct 17 10:48:29 2018 +0300
typo
commit a06f0f3d3aba53e766046221ee44fb9720389ecc
Merge: 94099586ec 3412345ffe
Author: Dmitry Stogov <dmitry@zend.com>
Date: Wed Oct 17 10:47:07 2018 +0300
Merge branch 'master' into immutable
* master:
Remove unused variable makefile_am_files
Classify object handlers are required/optional
Add support for getting SKIP_TAGSTART and SKIP_WHITE options
Remove some obsolete config_vars.mk occurrences
Remove bsd_converted from .gitignore
Remove configuration parser and scanners ignores
Remove obsolete buildconf.stamp from .gitignore
[ci skip] Add magicdata.patch exception to .gitignore
Remove outdated ext/spl/examples items from .gitignore
Remove unused test.inc in ext/iconv/tests
commit 94099586ec599117581ca01c15b1f6c5f749e23a
Author: Dmitry Stogov <dmitry@zend.com>
Date: Mon Oct 15 23:34:01 2018 +0300
Immutable clases and op_arrays
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