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Is there a web developer functionality/tool that allows us to know how many times a browser is doing reflows?
basically I want to have some sort of feedback/information. I don't know how it will be, but perhaps some sort of performance graph that shows the timeline (akin to Google's Speed Tracer) so I can investigate when suddenly at a point the browser is doing an insane amount of reflows so I can point out hey here's a bottleneck, there got to be a bug/bad implementation of something here or something.
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“Repaint” is the definition given to the process where the browser starts giving the right appearance to the elements that were placed in the Rendered Tree such as background colours or font-sizes. Repainting also happens in situations such as showing an hidden element, animating a node or changing a text colour.
Resizing the browser window, using JavaScript methods involving computed styles, adding or removing elements from the DOM, and changing an element's classes are a few of the things that can trigger reflow.
Repaint differs from reflow as reflow involves changes that affect layout of an element, repaint occurs when changes are made to an elements skin, but do not affect its layout like setting outline, visibility, background or color property of an element.
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