關(guān)鍵不在硬件加速，而在於是否 reflow。

A reflow is a more significant change. This will happen whenever the DOM tree is manipulated, whenever a style is changed that affects the layout, whenever the className property of an element is changed, or whenever the browser window size is changed.

使用 margin/top 修改會觸發(fā) reflow，拖慢速度。

Elements that are positioned absolutely or fixed, do not affect the layout of the main document, so if they reflow, they are the only thing that reflows. The document behind them will need to repaint to allow for any changes, but this is much less of a problem than an entire reflow.

absolute 和 fixed 的元素的 reflow 不會牽動整體，但依舊不如 transform 只需要 repaint。

而 translate 和 translate3d 的區(qū)別則在於硬件加速。

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