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The Fight Against Layout Jank

A web page isn't locked in stone just because it has rendered visually. Media assets, like images, can come in and cause the layout to shift based on their size, which typically isn't known in fluid layouts until they do render. Or fonts can load and reflow layout. Or XHRs can bring in more content to be placed onto the page. We're always doing what we can to prevent the layout from shifting around — that's what I mean … Read article

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Using the Paint Timing API

It's a great time to be a web performance aficionado, and the arrival of the Paint Timing API in Chrome 60 is proof positive of that fact. The Paint Timing API is yet another addition to the burgeoning Performance API, but instead of capturing page and resource timings, this new and experimental API allows you to capture metrics on when a page begins painting.

If you haven't experimented with any of the various performance APIs, it may help if … Read article

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Understanding the Critical Rendering Path

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