RE: [PHP-DEV] Merge HashTable and zend_array into a single data structure.

From: Date: Wed, 31 Dec 2014 17:50:33 +0000
Subject: RE: [PHP-DEV] Merge HashTable and zend_array into a single data structure.
References: 1  Groups: php.internals 
Request: Send a blank email to internals+get-80025@lists.php.net to get a copy of this message
> De : Dmitry Stogov [mailto:dmitry@zend.com] > Please take a look into the patch > > https://github.com/php/php-src/pull/970/files > > This real changes are in zend_types.h, the rest is renaming that in most > cases makes code cleaner. > > zend_array didn't change its binary representation, but now it's not > possible to get a pointer to embedded HashTable. The same zend_array > shoukd > be used instead. > > Each HashTable got an extra 64-bit zend_refcounted header. This leads to > some increase in memory consumption. > > The performance is slightly increased (may be measured with callgrind). > > The patch beaks one test (tests/lang/foreachLoopObjects.006.phpt), but > actually it just disclose a problem that we have anyway. > > The patch should be a base for the future optimizations. e.g. removing > HashTable->arData and/or HashTable->arHash and allocating them together > with zend_array; introducing EG(empty_array) etc. "Showing 46 changed files with 193 additions and 204 deletions". I am sorry but I can't analyze the impacts of your change, just from the patch. Did you write an RFC that would explain the impact, especially for extension writers ? More generally, what is the rule ? Is there a list of people who can introduce changes in the code, and even BC breaks in the C API, without writing RFCs, or is it just a question of rights/karma on the source repository ? I say that because it is especially hard to have a proposed change accepted on the mailing list, as several 'watchdogs' are there to dismiss ideas coming from people they don't know.

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