[[PHP]] > [[PHPNG]] - PHPNG a New Core for PHP7 -- https://drive.google.com/file/d/0B3UKOMH_4lgBUTdjUGxIZ3l1Ukk/view?usp=sharing - PHP7はなぜ速いのか(zval編) -- http://d.hatena.ne.jp/hnw/20141207