Re: [w3ctag/design-reviews] Layout Instability Metric (#393)

Hi,

We had an initial look during 10/07/19 telecon.

What we (and myself) are wondering are:

1. This looks like an interesting metric, and potentially something developers would choose to optimise for. Is it a good idea to focus optimisations to improve this particular score? Any particular unobvious concerns come to your mind?

2. Any general estimations on the score variations? How stable is the metric? Would it be particularly affected by dynamic elements like fonts?

3. How frequently is the score updated? At any change? Would that add to any further performance impacts?

4. Lastly: the metric would depend on the engine, the CPU, the network, etc. So site and possibly also user dependant. While access is to be "limited" to the particular site only, but can we reasonably imagine an "adversarial" design that would be crafted in a way to extract something attributable to the user's computing setting across sites?

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