All of the below properties or methods, when requested/called in JavaScript, will trigger the browser to synchronously calculate the style and layout*. This is also called reflow or layout thrashing, and is common performance bottleneck.
Generally, all APIs that synchronously provide layout metrics will trigger forced reflow / layout. Read on for additional cases and details.
elem.offsetLeft, elem.offsetTop, elem.offsetWidth, elem.offsetHeight, elem.offsetParent
| /** | |
| * Streaming Video Test | |
| * | |
| * References: | |
| * ----------- | |
| * http://serverfault.com/questions/288137/how-to-stream-live-video-from-a-linux-server | |
| * https://wiki.videolan.org/Stream_VLC_to_Website_with_asf_and_Flash#Method_2_H264_and_Flash_.flv | |
| * http://blog.morscad.com/code-snippets/creating-a-video-player-in-as3-using-netstream/ | |
| * | |
| * Sample videos: |
This is only a summary. For a full list of changes see the NEWS file.
| Feature | RFC / announcement | Author |
|---|---|---|
| Bundled ZendOptimizer+ as OPcache | https://wiki.php.net/rfc/optimizerplus | zeev |
| <?php | |
| namespace Jsor\MysqlAsync; | |
| use React\EventLoop\LoopInterface; | |
| use React\Promise\Deferred; | |
| class Connection | |
| { | |
| private $loop; |
| <?php | |
| class PseudoRandomGenerator { | |
| protected $state = null; | |
| public function __construct($seed) { | |
| $this->state = $seed; | |
| } | |
| public function next($max) { | |
| $bits = (int) floor(log($max, 2) + 1); | |
| $bytes = (int) max(ceil($bits / 8), 1); |
| class RedisCircularBuffer(object): | |
| def __init__(self, namespace, size): | |
| self.namespace = namespace | |
| self.size = size | |
| import redis | |
| self.redis = redis.Redis() | |
| def append(self, item): | |
| self.redis.lpush(self.namespace, item) |
In order to get a bit of "hard data" on what accessors will actually be used for once they are introduced I wrote a small script that scans through a codebase, finds all getter and setter methods and checks them for various characteristics. (The analyze.php file in this Gist.)
Here are the results of running it on a Symfony (Standard) skeleton.
absoluteTotal => 18516 (486.6%)
total => 3805 (100.0%)
skipped => 124 ( 3.3%)
| <?php | |
| use Symfony\Component\HttpKernel\Event\FilterControllerEvent; | |
| use Symfony\Component\HttpKernel\HttpKernelInterface; | |
| use Symfony\Component\HttpKernel\Event\GetResponseEvent; | |
| use Symfony\Component\HttpKernel\KernelEvents; | |
| use Symfony\Component\EventDispatcher\EventSubscriberInterface; | |
| class AcceptHeaderKernelListener implements EventSubscriberInterface | |
| { |